64635880164 has 24 divisors (see below), whose sum is σ = 150821193600. Its totient is φ = 21544701984.

The previous prime is 64635880117. The next prime is 64635880181. The reversal of 64635880164 is 46108853646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739237 + ... + 822035.

It is an arithmetic number, because the mean of its divisors is an integer number (6284216400).

Almost surely, 2^64635880164 is an apocalyptic number.

It is an amenable number.

64635880164 is an abundant number, since it is smaller than the sum of its proper divisors (86185313436).

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

64635880164 is a wasteful number, since it uses less digits than its factorization.

64635880164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147859 (or 147857 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 64635880164 in words is "sixty-four billion, six hundred thirty-five million, eight hundred eighty thousand, one hundred sixty-four".