165109158 has 16 divisors (see below), whose sum is σ = 366909360. Its totient is φ = 55036368.

The previous prime is 165109141. The next prime is 165109169. The reversal of 165109158 is 851901561.

165109158 is a `hidden beast` number, since 1 + 6 + 510 + 91 + 58 = 666.

It is a super-2 number, since 2×165109158² = 54522068110937928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1528735 + ... + 1528842.

It is an arithmetic number, because the mean of its divisors is an integer number (22931835).

Almost surely, 2^165109158 is an apocalyptic number.

165109158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165109158 is an abundant number, since it is smaller than the sum of its proper divisors (201800202).

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

165109158 is a wasteful number, since it uses less digits than its factorization.

165109158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057588 (or 3057582 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The square root of 165109158 is about 12849.4808455439. The cubic root of 165109158 is about 548.6015801996.

The spelling of 165109158 in words is "one hundred sixty-five million, one hundred nine thousand, one hundred fifty-eight".