Q: Is 640,264 a Prime Number?
A: No, 640,264 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 640264 can be evenly divided by 1 2 4 8 163 326 491 652 982 1,304 1,964 3,928 80,033 160,066 320,132 and 640,264, with no remainder.
Since 640,264 cannot be divided by just 1 and 640,264, it is not a prime number.