165145955 has 24 divisors (see below), whose sum is σ = 217869552. Its totient is φ = 120092544.

The previous prime is 165145943. The next prime is 165145961. The reversal of 165145955 is 559541561.

It is not a de Polignac number, because 165145955 - 2¹⁸ = 164883811 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55157 + ... + 58073.

It is an arithmetic number, because the mean of its divisors is an integer number (9077898).

Almost surely, 2^165145955 is an apocalyptic number.

165145955 is a deficient number, since it is larger than the sum of its proper divisors (52723597).

165145955 is a wasteful number, since it uses less digits than its factorization.

165145955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015 (or 3002 counting only the distinct ones).

The product of its digits is 135000, while the sum is 41.

The square root of 165145955 is about 12850.9126135073. The cubic root of 165145955 is about 548.6423318113.

The spelling of 165145955 in words is "one hundred sixty-five million, one hundred forty-five thousand, nine hundred fifty-five".