165172156624 has 10 divisors (see below), whose sum is σ = 320021053490. Its totient is φ = 82586078304.

The previous prime is 165172156579. The next prime is 165172156627. The reversal of 165172156624 is 426651271561.

It can be written as a sum of positive squares in only one way, i.e., 154056250000 + 11115906624 = 392500^2 + 105432^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165172156627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5161629879 + ... + 5161629910.

It is an arithmetic number, because the mean of its divisors is an integer number (32002105349).

Almost surely, 2^165172156624 is an apocalyptic number.

It is an amenable number.

165172156624 is a deficient number, since it is larger than the sum of its proper divisors (154848896866).

165172156624 is a wasteful number, since it uses less digits than its factorization.

165172156624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10323259797 (or 10323259791 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The spelling of 165172156624 in words is "one hundred sixty-five billion, one hundred seventy-two million, one hundred fifty-six thousand, six hundred twenty-four".