86172455656 has 48 divisors (see below), whose sum is σ = 193032512100. Its totient is φ = 35932909824.

The previous prime is 86172455597. The next prime is 86172455669. The reversal of 86172455656 is 65655427168.

It can be written as a sum of positive squares in 2 ways, for example, as 85983832900 + 188622756 = 293230^2 + 13734^2 .

It is a super-2 number, since 2×86172455656² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 86172455597 and 86172455606.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2956141 + ... + 2985148.

Almost surely, 2^86172455656 is an apocalyptic number.

It is an amenable number.

86172455656 is an abundant number, since it is smaller than the sum of its proper divisors (106860056444).

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

86172455656 is a wasteful number, since it uses less digits than its factorization.

86172455656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941346 (or 5941335 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 55.

The spelling of 86172455656 in words is "eighty-six billion, one hundred seventy-two million, four hundred fifty-five thousand, six hundred fifty-six".