Q: Is 648 a Prime Number?
A: No, 648 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 648 can be evenly divided by 1 2 3 4 6 8 9 12 18 24 27 36 54 72 81 108 162 216 324 and 648, with no remainder.
Since 648 cannot be divided by just 1 and 648, it is not a prime number.