64521663252024 has 64 divisors (see below), whose sum is σ = 175986281364480. Its totient is φ = 19550007072000.

The previous prime is 64521663251971. The next prime is 64521663252061. The reversal of 64521663252024 is 42025236612546.

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, 10004392 + ... + 15137079.

It is an arithmetic number, because the mean of its divisors is an integer number (2749785646320).

Almost surely, 2^{64521663252024} is an apocalyptic number.

It is an amenable number.

64521663252024 is an abundant number, since it is smaller than the sum of its proper divisors (111464618112456).

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

64521663252024 is a wasteful number, since it uses less digits than its factorization.

64521663252024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25151212 (or 25151208 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 64521663252024 in words is "sixty-four trillion, five hundred twenty-one billion, six hundred sixty-three million, two hundred fifty-two thousand, twenty-four".