165137572071 has 8 divisors (see below), whose sum is σ = 244648254960. Its totient is φ = 110091714696.

The previous prime is 165137572063. The next prime is 165137572123. The reversal of 165137572071 is 170275731561.

165137572071 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 3 + 7 + 572 + 0 + 71 = 666.

It is not a de Polignac number, because 165137572071 - 2³ = 165137572063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165137672071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3058103160 + ... + 3058103213.

It is an arithmetic number, because the mean of its divisors is an integer number (30581031870).

Almost surely, 2^165137572071 is an apocalyptic number.

165137572071 is a deficient number, since it is larger than the sum of its proper divisors (79510682889).

165137572071 is an equidigital number, since it uses as much as digits as its factorization.

165137572071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6116206382 (or 6116206376 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 45.

The spelling of 165137572071 in words is "one hundred sixty-five billion, one hundred thirty-seven million, five hundred seventy-two thousand, seventy-one".