2160156665565 has 48 divisors (see below), whose sum is σ = 3748796251200. Its totient is φ = 1150692258816.

The previous prime is 2160156665503. The next prime is 2160156665587. The reversal of 2160156665565 is 5655666510612.

It is not a de Polignac number, because 2160156665565 - 2⁸ = 2160156665309 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138295326 + ... + 138310944.

It is an arithmetic number, because the mean of its divisors is an integer number (78099921900).

Almost surely, 2^{2160156665565} is an apocalyptic number.

It is an amenable number.

2160156665565 is a deficient number, since it is larger than the sum of its proper divisors (1588639585635).

2160156665565 is a wasteful number, since it uses less digits than its factorization.

2160156665565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19146 (or 19143 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 54.

The spelling of 2160156665565 in words is "two trillion, one hundred sixty billion, one hundred fifty-six million, six hundred sixty-five thousand, five hundred sixty-five".