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## What is the highest number ever to be used?

googol

According to many books (such as Mathematics, A human Endeavor by Harold Jacobs)2 the googol is one of the largest numbers ever named. The googolplex is 1 followed by a googol zeros. More recently, **Skewer's number** is the largest number ever used in a mathematical proof.

## What is the highest number that is not infinity?

**There is no biggest**, last number … except infinity. Except infinity isn't a number. But some infinities are literally bigger than others.

## Is the largest number infinity?

**There is no biggest**, last number … except infinity. Except infinity isn't a number.

## What does billion look like?

1,000,000,000 (one billion, short scale; one thousand million or milliard, yard, long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn. In standard form, it is written as **1 × 109**.

## What does the number billion look like?

**If you write a 1 followed by nine zeros**, you get 1,000,000,000 = one billion! That's a lot of zeros! Astronomers often deal with even larger numbers such as a trillion (12 zeros) and a quadrillion (15 zeros).

## What is the last number known?

googol

A **googol** is the large number 10100. In decimal notation, it is written as the digit 1 followed by one hundred zeroes: 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000.