165825444 has 12 divisors (see below), whose sum is σ = 386926064. Its totient is φ = 55275144.

The previous prime is 165825437. The next prime is 165825449. The reversal of 165825444 is 444528561.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (165825449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6909382 + ... + 6909405.

Almost surely, 2^165825444 is an apocalyptic number.

It is an amenable number.

165825444 is an abundant number, since it is smaller than the sum of its proper divisors (221100620).

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

165825444 is a wasteful number, since it uses less digits than its factorization.

165825444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13818794 (or 13818792 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The square root of 165825444 is about 12877.3228584205. The cubic root of 165825444 is about 549.3937606663.

The spelling of 165825444 in words is "one hundred sixty-five million, eight hundred twenty-five thousand, four hundred forty-four".