165971313179556 has 48 divisors (see below), whose sum is σ = 390038650143744. Its totient is φ = 54928425524256.

The previous prime is 165971313179527. The next prime is 165971313179561. The reversal of 165971313179556 is 655971313179561.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41237176 + ... + 45082671.

It is an arithmetic number, because the mean of its divisors is an integer number (8125805211328).

Almost surely, 2^{165971313179556} is an apocalyptic number.

It is an amenable number.

165971313179556 is an abundant number, since it is smaller than the sum of its proper divisors (224067336964188).

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

165971313179556 is a wasteful number, since it uses less digits than its factorization.

165971313179556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86321000 (or 86320998 counting only the distinct ones).

The product of its digits is 160744500, while the sum is 69.

The spelling of 165971313179556 in words is "one hundred sixty-five trillion, nine hundred seventy-one billion, three hundred thirteen million, one hundred seventy-nine thousand, five hundred fifty-six".