165616056500565 has 32 divisors (see below), whose sum is σ = 289105372676736. Its totient is φ = 80290340156160.

The previous prime is 165616056500561. The next prime is 165616056500581. The reversal of 165616056500565 is 565005650616561.

It is not a de Polignac number, because 165616056500565 - 2² = 165616056500561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165616056500561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50620954 + ... + 53793243.

It is an arithmetic number, because the mean of its divisors is an integer number (9034542896148).

Almost surely, 2^{165616056500565} is an apocalyptic number.

165616056500565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165616056500565 is a deficient number, since it is larger than the sum of its proper divisors (123489316176171).

165616056500565 is a wasteful number, since it uses less digits than its factorization.

165616056500565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104423829.

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 165616056500565 in words is "one hundred sixty-five trillion, six hundred sixteen billion, fifty-six million, five hundred thousand, five hundred sixty-five".