636064011664 has 10 divisors (see below), whose sum is σ = 1232374022630. Its totient is φ = 318032005824.

The previous prime is 636064011659. The next prime is 636064011727. The reversal of 636064011664 is 466110460636.

It can be written as a sum of positive squares in only one way, i.e., 634922112400 + 1141899264 = 796820^2 + 33792^2 .

It is a super-2 number, since 2×636064011664² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 636064011664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19877000349 + ... + 19877000380.

It is an arithmetic number, because the mean of its divisors is an integer number (123237402263).

Almost surely, 2^636064011664 is an apocalyptic number.

It is an amenable number.

636064011664 is a deficient number, since it is larger than the sum of its proper divisors (596310010966).

636064011664 is a wasteful number, since it uses less digits than its factorization.

636064011664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39754000737 (or 39754000731 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 636064011664 in words is "six hundred thirty-six billion, sixty-four million, eleven thousand, six hundred sixty-four".