165291075372 has 12 divisors (see below), whose sum is σ = 385679175896. Its totient is φ = 55097025120.

The previous prime is 165291075349. The next prime is 165291075449. The reversal of 165291075372 is 273570192561.

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

It is a super-2 number, since 2×165291075372² (a number of 23 digits) contains 22 as substring.

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, 6887128129 + ... + 6887128152.

Almost surely, 2^165291075372 is an apocalyptic number.

165291075372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165291075372 is an abundant number, since it is smaller than the sum of its proper divisors (220388100524).

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

165291075372 is a wasteful number, since it uses less digits than its factorization.

165291075372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13774256288 (or 13774256286 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 48.

It can be divided in two parts, 16529 and 1075372, that added together give a palindrome (1091901).

The spelling of 165291075372 in words is "one hundred sixty-five billion, two hundred ninety-one million, seventy-five thousand, three hundred seventy-two".