64646652672 has 108 divisors (see below), whose sum is σ = 213019752400. Its totient is φ = 18470467584.

The previous prime is 64646652601. The next prime is 64646652703. The reversal of 64646652672 is 27625664646.

64646652672 is a `hidden beast` number, since 6 + 4 + 6 + 46 + 6 + 526 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1988047 + ... + 2020302.

Almost surely, 2^64646652672 is an apocalyptic number.

It is an amenable number.

64646652672 is an abundant number, since it is smaller than the sum of its proper divisors (148373099728).

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

64646652672 is a wasteful number, since it uses less digits than its factorization.

64646652672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4008378 (or 4008361 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 54.

The spelling of 64646652672 in words is "sixty-four billion, six hundred forty-six million, six hundred fifty-two thousand, six hundred seventy-two".