321613525164 has 48 divisors (see below), whose sum is σ = 779277735936. Its totient is φ = 103125043200.

The previous prime is 321613525139. The next prime is 321613525279. The reversal of 321613525164 is 461525316123.

It is a happy number.

It is a super-2 number, since 2×321613525164² (a number of 24 digits) contains 22 as substring.

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, 2526357 + ... + 2650604.

It is an arithmetic number, because the mean of its divisors is an integer number (16234952832).

Almost surely, 2^321613525164 is an apocalyptic number.

It is an amenable number.

321613525164 is an abundant number, since it is smaller than the sum of its proper divisors (457664210772).

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

321613525164 is a wasteful number, since it uses less digits than its factorization.

321613525164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177166 (or 5177164 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The spelling of 321613525164 in words is "three hundred twenty-one billion, six hundred thirteen million, five hundred twenty-five thousand, one hundred sixty-four".