171397856372 has 24 divisors (see below), whose sum is σ = 301489213536. Its totient is φ = 85258637408.

The previous prime is 171397856359. The next prime is 171397856411. The reversal of 171397856372 is 273658793171.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1177943 + ... + 1315425.

It is an arithmetic number, because the mean of its divisors is an integer number (12562050564).

Almost surely, 2^171397856372 is an apocalyptic number.

It is an amenable number.

171397856372 is a deficient number, since it is larger than the sum of its proper divisors (130091357164).

171397856372 is a wasteful number, since it uses less digits than its factorization.

171397856372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139087 (or 139085 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 59.

The spelling of 171397856372 in words is "one hundred seventy-one billion, three hundred ninety-seven million, eight hundred fifty-six thousand, three hundred seventy-two".