165764137 has 16 divisors (see below), whose sum is σ = 207424512. Its totient is φ = 128693520.

The previous prime is 165764117. The next prime is 165764143. The reversal of 165764137 is 731467561.

It is a cyclic number.

It is not a de Polignac number, because 165764137 - 2⁷ = 165764009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165764137.

It is not an unprimeable number, because it can be changed into a prime (165764117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17988 + ... + 25594.

It is an arithmetic number, because the mean of its divisors is an integer number (12964032).

Almost surely, 2^165764137 is an apocalyptic number.

It is an amenable number.

165764137 is a deficient number, since it is larger than the sum of its proper divisors (41660375).

165764137 is a wasteful number, since it uses less digits than its factorization.

165764137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908.

The product of its digits is 105840, while the sum is 40.

The square root of 165764137 is about 12874.9422134626. The cubic root of 165764137 is about 549.3260472240.

The spelling of 165764137 in words is "one hundred sixty-five million, seven hundred sixty-four thousand, one hundred thirty-seven".