165277917879 has 16 divisors (see below), whose sum is σ = 221872629600. Its totient is φ = 109434396800.

The previous prime is 165277917829. The next prime is 165277917919. The reversal of 165277917879 is 978719772561.

It is a cyclic number.

It is not a de Polignac number, because 165277917879 - 2²⁸ = 165009482423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165277917809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8553529 + ... + 8572829.

It is an arithmetic number, because the mean of its divisors is an integer number (13867039350).

Almost surely, 2^165277917879 is an apocalyptic number.

165277917879 is a deficient number, since it is larger than the sum of its proper divisors (56594711721).

165277917879 is a wasteful number, since it uses less digits than its factorization.

165277917879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38610.

The product of its digits is 93350880, while the sum is 69.

The spelling of 165277917879 in words is "one hundred sixty-five billion, two hundred seventy-seven million, nine hundred seventeen thousand, eight hundred seventy-nine".