165561626525164 has 96 divisors (see below), whose sum is σ = 313482789365760. Its totient is φ = 76329969408000.

The previous prime is 165561626525159. The next prime is 165561626525177. The reversal of 165561626525164 is 461525626165561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120353839 + ... + 121721689.

It is an arithmetic number, because the mean of its divisors is an integer number (3265445722560).

Almost surely, 2^{165561626525164} is an apocalyptic number.

It is an amenable number.

165561626525164 is a deficient number, since it is larger than the sum of its proper divisors (147921162840596).

165561626525164 is a wasteful number, since it uses less digits than its factorization.

165561626525164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368359 (or 1368357 counting only the distinct ones).

The product of its digits is 77760000, while the sum is 61.

The spelling of 165561626525164 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, six hundred twenty-six million, five hundred twenty-five thousand, one hundred sixty-four".