What is a 16-digit number?

A 16-digit number is a number that has 16 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 16-digit number? What is the largest 16-digit number? How many 16-digit numbers are there?

Smallest 16-digit number
The smallest 16-digit number is 1 followed by 15 zeros. This number is called one quadrillion.

Largest 16-digit number
The largest 16-digit number is 9 followed by another 15 nines. This number is called 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 16-digit numbers
There are a total of nine quadrillion different 16-digit numbers. nine quadrillion is 9 followed by 15 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 17-digit number?
Go here for information about the next digit number on our list that we have information about.