165312845 has 16 divisors (see below), whose sum is σ = 219179520. Its totient is φ = 119057664.

The previous prime is 165312821. The next prime is 165312859. The reversal of 165312845 is 548213561.

It is not a de Polignac number, because 165312845 - 2¹⁰ = 165311821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40325 + ... + 44234.

It is an arithmetic number, because the mean of its divisors is an integer number (13698720).

Almost surely, 2^165312845 is an apocalyptic number.

It is an amenable number.

165312845 is a deficient number, since it is larger than the sum of its proper divisors (53866675).

165312845 is a wasteful number, since it uses less digits than its factorization.

165312845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84604.

The product of its digits is 28800, while the sum is 35.

The square root of 165312845 is about 12857.4042870247. The cubic root of 165312845 is about 548.8270817047.

The spelling of 165312845 in words is "one hundred sixty-five million, three hundred twelve thousand, eight hundred forty-five".