165725072915 has 16 divisors (see below), whose sum is σ = 199506333312. Its totient is φ = 132156079104.

The previous prime is 165725072911. The next prime is 165725072987. The reversal of 165725072915 is 519270527561.

It is a cyclic number.

It is not a de Polignac number, because 165725072915 - 2² = 165725072911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165725072911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9776327 + ... + 9793263.

It is an arithmetic number, because the mean of its divisors is an integer number (12469145832).

Almost surely, 2^165725072915 is an apocalyptic number.

165725072915 is a deficient number, since it is larger than the sum of its proper divisors (33781260397).

165725072915 is a wasteful number, since it uses less digits than its factorization.

165725072915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23086.

The product of its (nonzero) digits is 1323000, while the sum is 50.

The spelling of 165725072915 in words is "one hundred sixty-five billion, seven hundred twenty-five million, seventy-two thousand, nine hundred fifteen".