Beyond Quadrillion: What Comes Next in Numbers?
The number quadrillion (1,000,000,000,000,000 or 1015) often feels like a peak of numerical comprehension for many. It’s a figure so large it can be difficult to truly grasp, representing sums like the estimated global wealth or the national debt of major superpowers. Yet, in the grand scheme of mathematics and the universe, a quadrillion is merely a stepping stone. This guide will take you on a journey beyond this staggering number, exploring what comes after quadrillion and the naming conventions that help us delineate these colossal quantities.
Last updated: April 24, 2026
In our daily lives, we rarely encounter numbers that approach even a billion, let alone a quadrillion. However, understanding these larger scales is essential for comprehending global economics, scientific measurements, and even fictional narratives about cosmic distances. The progression of number names is rooted in historical systems, primarily the Latin-based nomenclature that dominates Western mathematics and scientific communication.
Latest Update (April 2026)
Recent developments highlight the increasing relevance of immense numbers in technological and scientific fields. For instance, in March 2026, HPCwire reported that Neo4j is pushing the boundaries of graph databases, with their systems now capable of handling beyond a quadrillion nodes. This signifies a major leap in data management capabilities, requiring a solid understanding of numbers far exceeding quadrillions. And — advancements in quantum computing are enabling new computational approaches, as evidenced by the Aalto Team’s report on a new algorithm tackling quasicrystal calculations beyond classical limits, as covered by The Quantum Insider in April 2026. These breakthroughs highlight the ongoing need to define and comprehend ever-larger numerical scales.
The Direct Answer: What Comes Immediately After Quadrillion?
The number that comes immediately after quadrillion in the widely used short scale system is quintillion. In this system, commonly employed in English-speaking countries and financial contexts, a quintillion is represented as 1 followed by 18 zeros (1,000,000,000,000,000,000 or 1018). Each successive named number in this system represents a thousand times the previous one.
Understanding Number Scales: Short Scale vs. Long Scale
Before we delve deeper into numbers beyond quadrillion, it’s vital to understand the two primary systems for naming large numbers: the short scale and the long scale. The fundamental difference lies in how they define the named powers of a thousand.
The Short Scale
In the short scale, each new named number (million, billion, trillion, quadrillion, quintillion, etc.) is one thousand times the previous one. This system is used by the United States, the United Kingdom, and most English-speaking countries for financial and general purposes. In this system:
- Million = 106
- Billion = 109
- Trillion = 1012
- Quadrillion = 1015
- Quintillion = 1018
The Long Scale
The long scale, historically used in continental Europe and some other regions, defines each new named number as one million times the previous one. In this system:
- Million = 106
- Billion = 1 million million = 1012
- Trillion = 1 million billion = 1018
- Quadrillion = 1 million trillion = 1024
This discrepancy can lead to significant confusion, as what one system calls a trillion, another might call a billion. For instance, the U.S. trillion (1012) is equivalent to the long scale billion, and the U.S. quadrillion (1015) is equivalent to the long scale trillion. For clarity and consistency, especially in global finance and scientific communication where these large numbers are most frequently encountered, this guide will adhere to the short scale. According to the National Institute of Standards and Technology (NIST), the short scale is the standard for scientific and technical contexts in the U.S.
The March of the Millions: Quintillion and Beyond
Once we pass the quadrillion mark, the sequence continues with a predictable pattern, each step representing a tenfold increase in complexity and magnitude. The names are derived from Latin prefixes, indicating their position in the sequence.
Quintillion (1018)
The first number after quadrillion in the short scale is quintillion. it’s represented as a 1 followed by 18 zeros (1,000,000,000,000,000,000). In scientific notation, this is 1018.
Consider the scale: If the Earth’s population were approximately 8 billion people, and each person had a trillion dollars, the total would be 8 quintillion dollars. While current estimates of global wealth hover around a few hundred trillion dollars, making even a quintillion an astronomical sum in human economic terms, it’s a number that begins to approach such theoretical calculations.
Sextillion (1021)
Following quintillion is sextillion — which is 1 followed by 21 zeros (1,000,000,000,000,000,000,000). A sextillion is one thousand quintillion.
The scale of sextillions is more relevant to astronomical measurements. For instance, the estimated number of stars in the observable universe is thought to be in the range of 1022 to 1024. Thus, a sextillion is a unit of measure that begins to touch upon the sheer number of stars in our cosmos.
Septillion (1024)
Next in line is septillion — which is 1 followed by 24 zeros (1024). Here’s one thousand sextillion.
The number of atoms in a kilogram of carbon-12 is approximately 1025. A septillion is a quantity that starts to approach such fundamental physical scales. The estimated mass of the Earth is about 5.972 × 1024 kilograms, making it roughly 6 septillion kilograms. This illustrates how these immense numbers begin to describe the physical properties of planets and other celestial bodies.
Octillion (1027)
Octillion represents 1 followed by 27 zeros (1027), being one thousand septillion.
The estimated mass of the Sun is about 2 × 1030 kilograms, placing it in the range of several octillion kilograms. Numbers of this magnitude are essential for quantifying the mass of stars and other large cosmic objects.
Nonillion (1030)
Nonillion is 1 followed by 30 zeros (1030), or one thousand octillion.
The Milky Way galaxy is estimated to contain between 100 billion and 400 billion stars. If we consider the mass of galaxies, we’re firmly in nonillions and beyond. The estimated mass of the Milky Way galaxy is around 1042 kilograms, far exceeding nonillion, indicating the vastness of galactic structures.
Decillion (1033)
Decillion is 1 followed by 33 zeros (1033), representing one thousand nonillion.
These numbers are used to describe the mass of entire galaxy clusters or the total number of particles in the observable universe. The number of atoms in the observable universe is estimated to be around 1080, a figure that dwarfs decillion but is still within the scope of scientific notation and computational models.
Beyond the Decillion: The Realm of Undecillion and Further
While the Latin-based prefixes continue sequentially (undecillion, duodecillion, tredecillion, etc.), they quickly become unwieldy and are rarely used in everyday discourse. However, they’re essential in scientific contexts where extreme scales are discussed. Each of these names represents a thousandfold increase over the previous one in the short scale system.
Undecillion (1036)
Following decillion is undecillion — which is 1 followed by 36 zeros.
Duodecillion (1039)
Next is duodecillion, representing 1 followed by 39 zeros.
Tredecillion (1042)
Tredecillion signifies 1 followed by 42 zeros, a scale that can describe the mass of galaxies.
Quattuordecillion (1045)
This number is 1 followed by 45 zeros.
Quindecillion (1048)
Quindecillion is 1 followed by 48 zeros.
Sexdecillion (1051)
This number is 1 followed by 51 zeros.
Septendecillion (1054)
Septendecillion represents 1 followed by 54 zeros.
Octodecillion (1057)
Octodecillion is 1 followed by 57 zeros.
Novemdecillion (1060)
Novemdecillion is 1 followed by 60 zeros.
Vigintillion (1063)
Vigintillion marks the start of the twenties in the Latin prefixes, representing 1 followed by 63 zeros. This number is a thousand nonagintillion.
The Googol and the Googolplex: Beyond Named Numbers
As numbers grow astronomically large, named systems like the Latin-derived ones become insufficient and impractical. Mathematicians have devised other ways to represent such immense quantities. The most famous examples are the googol and the googolplex.
Googol (10100)
A googol is a very large number, defined as 1 followed by 100 zeros (10100). This number was popularized by Milton Sirotta, the nephew of American mathematician Edward Kasner. While a googol is an enormous quantity, it’s still smaller than a googolplex.
Googolplex (10Googol)
A googolplex is an even more mind-bogglingly large number. it’s defined as 10 raised to the power of a googol (1010100). Writing out a googolplex in full is physically impossible, as it would require more zeros than there are atoms in the observable universe. The concept of a googolplex illustrates the limits of our ability to conceptualize and write down numbers, even with scientific notation.
Applications of Immense Numbers in 2026
In 2026, the comprehension and manipulation of numbers far beyond quadrillions aren’t just theoretical exercises but practical necessities in several latest fields:
Scientific Research and Cosmology
Cosmology continues to push the boundaries of numerical understanding. Estimates of the total number of particles in the observable universe hover around 1080. origins, structure, and ultimate fate of the universe requires grappling with numbers in the septillions, octillions, and beyond. As scientists explore phenomena like dark matter, dark energy, and the potential for multiverses, the scales involved necessitate these vast numerical frameworks. The ongoing research into quasicrystals, as reported by The Quantum Insider, also necessitates advanced mathematical algorithms capable of handling complex calculations that may involve extremely large or small numbers.
Data Science and Computing
The explosion of big data means that even in database management, numbers like quadrillions are becoming commonplace. As HPCwire reported in March 2026, Neo4j’s advancement to handle over a quadrillion nodes in their graph databases showcases the demand for infrastructure capable of managing such colossal datasets. This trend requires not only the development of more powerful hardware but also sophisticated algorithms and data structures that can efficiently process and query information on these immense scales.
Economics and Finance
While direct encounters with numbers in the sextillions or septillions are rare in typical financial transactions, these scales are relevant in macroeconomic modeling and projections. Global financial systems manage trillions of dollars daily, and understanding potential future economic scenarios, such as the growth of digital currencies or the impact of global trade on national economies, involves calculations that can quickly escalate. The concept of ‘bank tokens’ as discussed by Citigroup in November 2025, suggests a future financial landscape where transaction volumes could necessitate an understanding of even larger numerical magnitudes.
Artificial Intelligence
The development and deployment of advanced AI models, as explored by The Smart Investor in January 2026 regarding Meta, Microsoft, and Alphabet’s monetization strategies, involve complex computations and vast datasets. Training sophisticated AI often requires processing petabytes or exabytes of data, and the underlying mathematical operations can involve numbers of significant magnitude. The search for true artificial general intelligence (AGI) may even involve theoretical models that operate on scales we can currently only approximate with terms like googolplex.
Frequently Asked Questions
what’s the difference between a short scale billion and a long scale billion?
In the short scale, a billion is 109 (one thousand million). In the long scale, a billion is 1012 (one million million). Here’s a key source of confusion when comparing numbers across different regions or historical texts.
Are there named numbers beyond vigintillion?
Yes, the Latin-based naming convention continues with prefixes for larger numbers, such as trigintillion (1063), quadragintillion (1072), quinquagintillion (1081), sexagintillion (1090), septuagintillion (1099), octogintillion (10108), and nonagintillion (10117). However, these are rarely used in practice.
How large is a googolplex in practical terms?
A googolplex (1010100) is so unimaginably large that it can’t be written out in digits. The number of atoms in the observable universe is estimated to be around 1080. A googolplex is vastly larger than this, making it a conceptual number rather than one with practical physical representation.
Why is the short scale preferred in science and finance?
The short scale is preferred due to its simpler progression (each named number is 1000 times the previous) and its widespread adoption in major English-speaking countries and international scientific bodies like NIST. This standardization reduces ambiguity in global communication.
Can we ever truly comprehend numbers like googolplex?
While we can define and work with numbers like googolplex mathematically, our human intuition struggles to grasp their true scale. They serve as powerful conceptual tools to represent the immense, often incomprehensible, magnitudes encountered in theoretical physics, cosmology, and advanced mathematics.
Conclusion
The journey beyond quadrillion reveals a universe of numbers that expand exponentially, each step a thousandfold leap into incomprehensible magnitude. From quintillions that begin to quantify cosmic populations to septillions describing planetary masses, and octillions and nonillions detailing stellar and galactic scales, these names provide a framework for immensity of the cosmos. While practical applications in fields like data science and economics, as evidenced by recent reports from Neo4j and Citigroup in 2025-2026, are increasingly engaging with numbers in the quadrillions and beyond, theoretical concepts like the googol and googolplex push the boundaries of imagination. As our scientific and technological efforts continue to expand, so too will our need to understand and name the ever-larger numbers that describe our universe and our capabilities.
