165809152 has 22 divisors (see below), whose sum is σ = 331458428. Its totient is φ = 82904064.

The previous prime is 165809131. The next prime is 165809167. The reversal of 165809152 is 251908561.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79938 + ... + 81985.

Almost surely, 2^165809152 is an apocalyptic number.

It is an amenable number.

165809152 is a deficient number, since it is larger than the sum of its proper divisors (165649276).

165809152 is an equidigital number, since it uses as much as digits as its factorization.

165809152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161943 (or 161925 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 165809152 is about 12876.6902579817. The cubic root of 165809152 is about 549.3757678178.

The spelling of 165809152 in words is "one hundred sixty-five million, eight hundred nine thousand, one hundred fifty-two".