165408044 has 24 divisors (see below), whose sum is σ = 295611120. Its totient is φ = 80966144.

The previous prime is 165408043. The next prime is 165408049. The reversal of 165408044 is 440804561.

It is a self number, because there is not a number n which added to its sum of digits gives 165408044.

It is not an unprimeable number, because it can be changed into a prime (165408041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35312 + ... + 39720.

It is an arithmetic number, because the mean of its divisors is an integer number (12317130).

Almost surely, 2^165408044 is an apocalyptic number.

It is an amenable number.

165408044 is a deficient number, since it is larger than the sum of its proper divisors (130203076).

165408044 is a wasteful number, since it uses less digits than its factorization.

165408044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 165408044 is about 12861.1058622499. The cubic root of 165408044 is about 548.9324128285.

The spelling of 165408044 in words is "one hundred sixty-five million, four hundred eight thousand, forty-four".