86172391672 has 64 divisors (see below), whose sum is σ = 173741500800. Its totient is φ = 39923220480.

The previous prime is 86172391667. The next prime is 86172391673. The reversal of 86172391672 is 27619327168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86172391673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3781272 + ... + 3803992.

It is an arithmetic number, because the mean of its divisors is an integer number (2714710950).

Almost surely, 2^86172391672 is an apocalyptic number.

It is an amenable number.

86172391672 is an abundant number, since it is smaller than the sum of its proper divisors (87569109128).

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

86172391672 is a wasteful number, since it uses less digits than its factorization.

86172391672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23176 (or 23172 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The spelling of 86172391672 in words is "eighty-six billion, one hundred seventy-two million, three hundred ninety-one thousand, six hundred seventy-two".