64965913824 has 72 divisors (see below), whose sum is σ = 198378072648. Its totient is φ = 18561688320.

The previous prime is 64965913819. The next prime is 64965913843. The reversal of 64965913824 is 42831956946.

It is a congruent number.

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, 6900687 + ... + 6910094.

It is an arithmetic number, because the mean of its divisors is an integer number (2755251009).

Almost surely, 2^64965913824 is an apocalyptic number.

It is an amenable number.

64965913824 is an abundant number, since it is smaller than the sum of its proper divisors (133412158824).

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

64965913824 is a wasteful number, since it uses less digits than its factorization.

64965913824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13810808 (or 13810793 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The spelling of 64965913824 in words is "sixty-four billion, nine hundred sixty-five million, nine hundred thirteen thousand, eight hundred twenty-four".