641797326864 has 120 divisors (see below), whose sum is σ = 1800610860672. Its totient is φ = 213400661760.

The previous prime is 641797326851. The next prime is 641797326883. The reversal of 641797326864 is 468623797146.

It is a happy number.

641797326864 is a `hidden beast` number, since 64 + 179 + 7 + 326 + 86 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224324794 + ... + 224327654.

Almost surely, 2^641797326864 is an apocalyptic number.

It is an amenable number.

641797326864 is an abundant number, since it is smaller than the sum of its proper divisors (1158813533808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641797326864 is a wasteful number, since it uses less digits than its factorization.

641797326864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6205 (or 6196 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 641797326864 in words is "six hundred forty-one billion, seven hundred ninety-seven million, three hundred twenty-six thousand, eight hundred sixty-four".