165145938 has 16 divisors (see below), whose sum is σ = 332510400. Its totient is φ = 54678896.

The previous prime is 165145927. The next prime is 165145943. The reversal of 165145938 is 839541561.

It is a self number, because there is not a number n which added to its sum of digits gives 165145938.

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, 91470 + ... + 93257.

It is an arithmetic number, because the mean of its divisors is an integer number (20781900).

Almost surely, 2^165145938 is an apocalyptic number.

165145938 is an abundant number, since it is smaller than the sum of its proper divisors (167364462).

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

165145938 is a wasteful number, since it uses less digits than its factorization.

165145938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184881.

The product of its digits is 129600, while the sum is 42.

The square root of 165145938 is about 12850.9119520756. The cubic root of 165145938 is about 548.6423129857.

The spelling of 165145938 in words is "one hundred sixty-five million, one hundred forty-five thousand, nine hundred thirty-eight".