641044970617 has 2 divisors, whose sum is σ = 641044970618. Its totient is φ = 641044970616.

The previous prime is 641044970593. The next prime is 641044970659. The reversal of 641044970617 is 716079440146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640545716281 + 499254336 = 800341^2 + 22344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641044970617 is a prime.

It is not a weakly prime, because it can be changed into another prime (641044970117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320522485308 + 320522485309.

It is an arithmetic number, because the mean of its divisors is an integer number (320522485309).

Almost surely, 2^641044970617 is an apocalyptic number.

It is an amenable number.

641044970617 is a deficient number, since it is larger than the sum of its proper divisors (1).

641044970617 is an equidigital number, since it uses as much as digits as its factorization.

641044970617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 641044970617 in words is "six hundred forty-one billion, forty-four million, nine hundred seventy thousand, six hundred seventeen".