165312045 has 12 divisors (see below), whose sum is σ = 286540956. Its totient is φ = 88166400.

The previous prime is 165312011. The next prime is 165312061. The reversal of 165312045 is 540213561.

165312045 is a `hidden beast` number, since 1 + 653 + 1 + 2 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 83119689 + 82192356 = 9117^2 + 9066^2 .

It is not a de Polignac number, because 165312045 - 2⁷ = 165311917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1836756 + ... + 1836845.

It is an arithmetic number, because the mean of its divisors is an integer number (23878413).

Almost surely, 2^165312045 is an apocalyptic number.

165312045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165312045 is a deficient number, since it is larger than the sum of its proper divisors (121228911).

165312045 is a wasteful number, since it uses less digits than its factorization.

165312045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673612 (or 3673609 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 165312045 is about 12857.3731765085. The cubic root of 165312045 is about 548.8261963886.

The spelling of 165312045 in words is "one hundred sixty-five million, three hundred twelve thousand, forty-five".