What is a 39-digit number?

A 39-digit number is a number that has 39 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 39-digit number? What is the largest 39-digit number? How many 39-digit numbers are there?

Smallest 39-digit number
The smallest 39-digit number is 1 followed by 38 zeros. This number is called one hundred undecillion.

Largest 39-digit number
The largest 39-digit number is 9 followed by another 38 nines. This number is called nine hundred ninety-nine undecillion nine hundred ninety-nine decillion nine hundred ninety-nine nonillion nine hundred ninety-nine octillion nine hundred ninety-nine septillion nine hundred ninety-nine sextillion nine hundred ninety-nine quintillion nine hundred ninety-nine quadrillion nine hundred ninety-nine trillion nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine.

Total number of 39-digit numbers
There are a total of nine hundred undecillion different 39-digit numbers. nine hundred undecillion is 9 followed by 38 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 40-digit number?
Go here for information about the next digit number on our list that we have information about.