165817992 has 32 divisors (see below), whose sum is σ = 414878400. Its totient is φ = 55228224.

The previous prime is 165817991. The next prime is 165818011. The reversal of 165817992 is 299718561.

It is not an unprimeable number, because it can be changed into a prime (165817991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43258 + ... + 46934.

It is an arithmetic number, because the mean of its divisors is an integer number (12964950).

Almost surely, 2^165817992 is an apocalyptic number.

165817992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165817992 is an abundant number, since it is smaller than the sum of its proper divisors (249060408).

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

165817992 is a wasteful number, since it uses less digits than its factorization.

165817992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5561 counting only the distinct ones).

The product of its digits is 272160, while the sum is 48.

The square root of 165817992 is about 12877.0335093142. The cubic root of 165817992 is about 549.3855308404.

The spelling of 165817992 in words is "one hundred sixty-five million, eight hundred seventeen thousand, nine hundred ninety-two".