Q: How Many Digits in the Number 644,606,064?

 A: The number 644,606,064 has 9 digits.

How does 644,606,064 have 9 digits?

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


644606064
Digit # 123456789

What are the number of digits of the numbers near 644,606,064?

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