165556236 has 12 divisors (see below), whose sum is σ = 386297912. Its totient is φ = 55185408.

The previous prime is 165556219. The next prime is 165556267. The reversal of 165556236 is 632655561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 165556194 and 165556203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6898165 + ... + 6898188.

Almost surely, 2^165556236 is an apocalyptic number.

It is an amenable number.

165556236 is an abundant number, since it is smaller than the sum of its proper divisors (220741676).

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

165556236 is a wasteful number, since it uses less digits than its factorization.

165556236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13796360 (or 13796358 counting only the distinct ones).

The product of its digits is 162000, while the sum is 39.

The square root of 165556236 is about 12866.8658188387. The cubic root of 165556236 is about 549.0962966573.

It can be divided in two parts, 16555 and 6236, that added together give a triangular number (22791 = T₂₁₃).

The spelling of 165556236 in words is "one hundred sixty-five million, five hundred fifty-six thousand, two hundred thirty-six".