Q: Is 561,616 a Prime Number?
A: No, 561,616 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 561616 can be evenly divided by 1 2 4 8 11 16 22 44 88 176 3,191 6,382 12,764 25,528 35,101 51,056 70,202 140,404 280,808 and 561,616, with no remainder.
Since 561,616 cannot be divided by just 1 and 561,616, it is not a prime number.