Ask Dr. Math: FAQ L arge N umbers and I nfinity Dr. Math FAQ Classic Problems Formulas Search Dr. Math ... Dr. Math Home What's the largest number? What's a googol? How do we name large numbers? What is infinity? What's the largest number? There is no largest number! Why? Well, 1,000,000,000 (1 billion) can't be the largest number because 1 billion + 1 is bigger - but that is true for any number you pick. You can choose any big number and I can make a bigger one just by adding 1 to it. What's a googol? A googol is a 1 with a hundred zeroes behind it. We can write a googol using exponents by saying a googol is 10^100. The biggest named number that we know is googolplex, ten to the googol power, or That's written as a one followed by googol zeroes. How do we name large numbers? There's some disagreement in the English language about how to name large numbers. There are two systems, the American and the English: Scientific American: Number Notation Thousand 1,000 10^3 Million 1,000,000 10^6 Billion 1,000,000,000 10^9 Trillion 1,000,000,000,000 10^12 Quadrillion 1,000,000,000,000,000 10^15 Quintillion 1,000,000,000,000,000,000 10^18 English: Thousand 1,000 10^3 Million 1,000,000 10^6 Thousand Million 1,000,000,000 10^9 Billion 1,000,000,000,000 10^12 Thousand Billion 1,000,000,000,000,000 10^15 Trillion 1,000,000,000,000,000,000 10^18 | |
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