Q: How Many Digits in the Number 621,415,638?

 A: The number 621,415,638 has 9 digits.

How does 621,415,638 have 9 digits?

You simply count the number of digits from the first number to the last. Like this:


621415638
Digit # 123456789

What are the number of digits of the numbers near 621,415,638?

621,415,636621,415,637621,415,639621,415,640
9999

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