165404164 has 12 divisors (see below), whose sum is σ = 290147788. Its totient is φ = 82504800.

The previous prime is 165404147. The next prime is 165404167. The reversal of 165404164 is 461404561.

It can be written as a sum of positive squares in 2 ways, for example, as 4875264 + 160528900 = 2208^2 + 12670^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (165404167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47427 + ... + 50794.

Almost surely, 2^165404164 is an apocalyptic number.

It is an amenable number.

165404164 is a deficient number, since it is larger than the sum of its proper divisors (124743624).

165404164 is a wasteful number, since it uses less digits than its factorization.

165404164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98646 (or 98644 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 165404164 is about 12860.9550189712. The cubic root of 165404164 is about 548.9281206664.

The spelling of 165404164 in words is "one hundred sixty-five million, four hundred four thousand, one hundred sixty-four".