165256164 has 36 divisors (see below), whose sum is σ = 431208960. Its totient is φ = 53308080.

The previous prime is 165256163. The next prime is 165256193. The reversal of 165256164 is 461652561.

165256164 is a `hidden beast` number, since 16 + 5 + 25 + 616 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (165256163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72924 + ... + 75155.

Almost surely, 2^165256164 is an apocalyptic number.

It is an amenable number.

165256164 is an abundant number, since it is smaller than the sum of its proper divisors (265952796).

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

165256164 is a wasteful number, since it uses less digits than its factorization.

165256164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148120 (or 148115 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 165256164 is about 12855.1998817599. The cubic root of 165256164 is about 548.7643488827.

The spelling of 165256164 in words is "one hundred sixty-five million, two hundred fifty-six thousand, one hundred sixty-four".