165431871632 has 80 divisors (see below), whose sum is σ = 330757972992. Its totient is φ = 80114012160.

The previous prime is 165431871617. The next prime is 165431871643. The reversal of 165431871632 is 236178134561.

It is a Harshad number since it is a multiple of its sum of digits (47).

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, 77412068 + ... + 77414204.

Almost surely, 2^165431871632 is an apocalyptic number.

It is an amenable number.

165431871632 is a deficient number, since it is larger than the sum of its proper divisors (165326101360).

165431871632 is a wasteful number, since it uses less digits than its factorization.

165431871632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216 (or 3210 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 165431871632 in words is "one hundred sixty-five billion, four hundred thirty-one million, eight hundred seventy-one thousand, six hundred thirty-two".