165545625 has 40 divisors (see below), whose sum is σ = 315249088. Its totient is φ = 75672000.

The previous prime is 165545599. The next prime is 165545629. The reversal of 165545625 is 526545561.

It is a happy number.

165545625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165545625 - 2¹⁰ = 165544601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165545629) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6819 + ... + 19431.

Almost surely, 2^165545625 is an apocalyptic number.

165545625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165545625 is a deficient number, since it is larger than the sum of its proper divisors (149703463).

165545625 is an equidigital number, since it uses as much as digits as its factorization.

165545625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12643 (or 12628 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 165545625 is about 12866.4534740541. The cubic root of 165545625 is about 549.0845653257.

The spelling of 165545625 in words is "one hundred sixty-five million, five hundred forty-five thousand, six hundred twenty-five".