165919164 has 24 divisors (see below), whose sum is σ = 390980688. Its totient is φ = 54758400.

The previous prime is 165919163. The next prime is 165919177. The reversal of 165919164 is 461919561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165919163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67237 + ... + 69660.

It is an arithmetic number, because the mean of its divisors is an integer number (16290862).

Almost surely, 2^165919164 is an apocalyptic number.

It is an amenable number.

165919164 is an abundant number, since it is smaller than the sum of its proper divisors (225061524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165919164 is a wasteful number, since it uses less digits than its factorization.

165919164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137005 (or 137003 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 165919164 is about 12880.9612995304. The cubic root of 165919164 is about 549.4972419435.

The spelling of 165919164 in words is "one hundred sixty-five million, nine hundred nineteen thousand, one hundred sixty-four".