165931320876 has 12 divisors (see below), whose sum is σ = 387173082072. Its totient is φ = 55310440288.

The previous prime is 165931320739. The next prime is 165931320899. The reversal of 165931320876 is 678023139561.

165931320876 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6913805025 + ... + 6913805048.

It is an arithmetic number, because the mean of its divisors is an integer number (32264423506).

Almost surely, 2^165931320876 is an apocalyptic number.

It is an amenable number.

165931320876 is an abundant number, since it is smaller than the sum of its proper divisors (221241761196).

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

165931320876 is a wasteful number, since it uses less digits than its factorization.

165931320876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827610080 (or 13827610078 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 165931320876 in words is "one hundred sixty-five billion, nine hundred thirty-one million, three hundred twenty thousand, eight hundred seventy-six".