64576945872 has 40 divisors (see below), whose sum is σ = 185359753280. Its totient is φ = 21525648480.

The previous prime is 64576945859. The next prime is 64576945883. The reversal of 64576945872 is 27854967546.

64576945872 is a `hidden beast` number, since 6 + 4 + 57 + 69 + 458 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74741404 + ... + 74742267.

It is an arithmetic number, because the mean of its divisors is an integer number (4633993832).

Almost surely, 2^64576945872 is an apocalyptic number.

It is an amenable number.

64576945872 is an abundant number, since it is smaller than the sum of its proper divisors (120782807408).

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

64576945872 is a wasteful number, since it uses less digits than its factorization.

64576945872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149483688 (or 149483676 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 64576945872 in words is "sixty-four billion, five hundred seventy-six million, nine hundred forty-five thousand, eight hundred seventy-two".