165607275723 has 16 divisors (see below), whose sum is σ = 223308640800. Its totient is φ = 109155580160.

The previous prime is 165607275683. The next prime is 165607275737. The reversal of 165607275723 is 327572706561.

It is a cyclic number.

It is not a de Polignac number, because 165607275723 - 2¹³ = 165607267531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165607205723) 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, 6614713 + ... + 6639701.

It is an arithmetic number, because the mean of its divisors is an integer number (13956790050).

Almost surely, 2^165607275723 is an apocalyptic number.

165607275723 is a deficient number, since it is larger than the sum of its proper divisors (57701365077).

165607275723 is a wasteful number, since it uses less digits than its factorization.

165607275723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49902.

The product of its (nonzero) digits is 3704400, while the sum is 51.

It can be divided in two parts, 165607 and 275723, that added together give a triangular number (441330 = T₉₃₉).

The spelling of 165607275723 in words is "one hundred sixty-five billion, six hundred seven million, two hundred seventy-five thousand, seven hundred twenty-three".