Q: Is 81,536 a Prime Number?
A: No, 81,536 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 81536 can be evenly divided by 1 2 4 7 8 13 14 16 26 28 32 49 52 56 64 91 98 104 112 128 182 196 208 224 364 392 416 448 637 728 784 832 896 1,274 1,456 1,568 1,664 2,548 2,912 3,136 5,096 5,824 6,272 10,192 11,648 20,384 40,768 and 81,536, with no remainder.
Since 81,536 cannot be divided by just 1 and 81,536, it is not a prime number.