165645516 has 12 divisors (see below), whose sum is σ = 386506232. Its totient is φ = 55215168.

The previous prime is 165645461. The next prime is 165645533. The reversal of 165645516 is 615546561.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 6901885 + ... + 6901908.

Almost surely, 2^165645516 is an apocalyptic number.

It is an amenable number.

165645516 is an abundant number, since it is smaller than the sum of its proper divisors (220860716).

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

165645516 is a wasteful number, since it uses less digits than its factorization.

165645516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13803800 (or 13803798 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 165645516 is about 12870.3347275819. The cubic root of 165645516 is about 549.1949831799.

The spelling of 165645516 in words is "one hundred sixty-five million, six hundred forty-five thousand, five hundred sixteen".