Six hundred forty one
641 is an odd number.
641 is a prime number, which means it is only divisible by 1 and itself.
641 is a Sophie Germain prime, which means that 2 x 641 + 1 = 1283 is also a prime number.
In binary, 641 is represented as 1010000001.
In hex, 641 is represented as 281.
Prime factorization of 641: 641.