85556170872 has 48 divisors (see below), whose sum is σ = 231741062280. Its totient is φ = 28515470400.

The previous prime is 85556170811. The next prime is 85556170877. The reversal of 85556170872 is 27807165558.

85556170872 is a `hidden beast` number, since 8 + 5 + 5 + 561 + 7 + 0 + 8 + 72 = 666.

It is a super-2 number, since 2×85556170872² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85556170877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 615247 + ... + 741377.

Almost surely, 2^85556170872 is an apocalyptic number.

It is an amenable number.

85556170872 is an abundant number, since it is smaller than the sum of its proper divisors (146184891408).

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

85556170872 is a wasteful number, since it uses less digits than its factorization.

85556170872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135564 (or 135557 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 54.

The spelling of 85556170872 in words is "eighty-five billion, five hundred fifty-six million, one hundred seventy thousand, eight hundred seventy-two".