321316818372 has 72 divisors (see below), whose sum is σ = 938176398432. Its totient is φ = 91641158400.

The previous prime is 321316818349. The next prime is 321316818409. The reversal of 321316818372 is 273818613123.

321316818372 is a `hidden beast` number, since 3 + 213 + 1 + 68 + 1 + 8 + 372 = 666.

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, 23858154 + ... + 23871617.

It is an arithmetic number, because the mean of its divisors is an integer number (13030227756).

Almost surely, 2^321316818372 is an apocalyptic number.

It is an amenable number.

321316818372 is an abundant number, since it is smaller than the sum of its proper divisors (616859580060).

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

321316818372 is a wasteful number, since it uses less digits than its factorization.

321316818372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47729809 (or 47729804 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 321316818372 in words is "three hundred twenty-one billion, three hundred sixteen million, eight hundred eighteen thousand, three hundred seventy-two".