165633156 has 36 divisors (see below), whose sum is σ = 450891532. Its totient is φ = 50963904.

The previous prime is 165633133. The next prime is 165633161. The reversal of 165633156 is 651336561.

165633156 is a `hidden beast` number, since 1 + 6 + 5 + 633 + 15 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16402500 + 149230656 = 4050^2 + 12216^2 .

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 a self number, because there is not a number n which added to its sum of digits gives 165633156.

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, 176491 + ... + 177426.

Almost surely, 2^165633156 is an apocalyptic number.

It is an amenable number.

165633156 is an abundant number, since it is smaller than the sum of its proper divisors (285258376).

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

165633156 is a wasteful number, since it uses less digits than its factorization.

165633156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353940 (or 353935 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 165633156 is about 12869.8545446326. The cubic root of 165633156 is about 549.1813230479.

The spelling of 165633156 in words is "one hundred sixty-five million, six hundred thirty-three thousand, one hundred fifty-six".