86656591056 has 160 divisors (see below), whose sum is σ = 267596587008. Its totient is φ = 23626690560.

The previous prime is 86656591001. The next prime is 86656591069. The reversal of 86656591056 is 65019565668.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 86656590987 and 86656591005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3317760 + ... + 3343776.

Almost surely, 2^86656591056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86656591056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133798293504).

86656591056 is an abundant number, since it is smaller than the sum of its proper divisors (180939995952).

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

86656591056 is a wasteful number, since it uses less digits than its factorization.

86656591056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26489 (or 26483 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 57.

The spelling of 86656591056 in words is "eighty-six billion, six hundred fifty-six million, five hundred ninety-one thousand, fifty-six".