165565156568 has 16 divisors (see below), whose sum is σ = 354782478480. Its totient is φ = 70956495648.

The previous prime is 165565156529. The next prime is 165565156579. The reversal of 165565156568 is 865651565561.

165565156568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478260271 + ... + 1478260382.

It is an arithmetic number, because the mean of its divisors is an integer number (22173904905).

Almost surely, 2^165565156568 is an apocalyptic number.

It is an amenable number.

165565156568 is an abundant number, since it is smaller than the sum of its proper divisors (189217321912).

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

165565156568 is a wasteful number, since it uses less digits than its factorization.

165565156568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956520666 (or 2956520662 counting only the distinct ones).

The product of its digits is 32400000, while the sum is 59.

The spelling of 165565156568 in words is "one hundred sixty-five billion, five hundred sixty-five million, one hundred fifty-six thousand, five hundred sixty-eight".