64646604444444 has 48 divisors (see below), whose sum is σ = 164555473743360. Its totient is φ = 19589822919040.

The previous prime is 64646604444407. The next prime is 64646604444451. The reversal of 64646604444444 is 44444440664646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74503597 + ... + 75366299.

It is an arithmetic number, because the mean of its divisors is an integer number (3428239036320).

Almost surely, 2^{64646604444444} is an apocalyptic number.

It is an amenable number.

64646604444444 is an abundant number, since it is smaller than the sum of its proper divisors (99908869298916).

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

64646604444444 is a wasteful number, since it uses less digits than its factorization.

64646604444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430410 (or 1430408 counting only the distinct ones).

The product of its (nonzero) digits is 339738624, while the sum is 60.

The spelling of 64646604444444 in words is "sixty-four trillion, six hundred forty-six billion, six hundred four million, four hundred forty-four thousand, four hundred forty-four".