521632723353372 has 72 divisors (see below), whose sum is σ = 1422476805059856. Its totient is φ = 160561755753984.

The previous prime is 521632723353337. The next prime is 521632723353487. The reversal of 521632723353372 is 273353327236125.

521632723353372 is a `hidden beast` number, since 5 + 2 + 1 + 6 + 3 + 2 + 7 + 2 + 33 + 533 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8040920878 + ... + 8040985749.

It is an arithmetic number, because the mean of its divisors is an integer number (19756622292498).

Almost surely, 2^{521632723353372} is an apocalyptic number.

It is an amenable number.

521632723353372 is an abundant number, since it is smaller than the sum of its proper divisors (900844081706484).

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

521632723353372 is a wasteful number, since it uses less digits than its factorization.

521632723353372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16081906707 (or 16081906702 counting only the distinct ones).

The product of its digits is 28576800, while the sum is 54.

The spelling of 521632723353372 in words is "five hundred twenty-one trillion, six hundred thirty-two billion, seven hundred twenty-three million, three hundred fifty-three thousand, three hundred seventy-two".