8556856988832 has 192 divisors, whose sum is σ = 26047052478720. Its totient is φ = 2727807667200.

The previous prime is 8556856988821. The next prime is 8556856988857. The reversal of 8556856988832 is 2388896586558.

8556856988832 is a `hidden beast` number, since 8 + 556 + 8 + 56 + 9 + 8 + 8 + 8 + 3 + 2 = 666.

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, 127564582 + ... + 127631642.

It is an arithmetic number, because the mean of its divisors is an integer number (135661731660).

Almost surely, 2^{8556856988832} 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 8556856988832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13023526239360).

8556856988832 is an abundant number, since it is smaller than the sum of its proper divisors (17490195489888).

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

8556856988832 is a wasteful number, since it uses less digits than its factorization.

8556856988832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73524 (or 73510 counting only the distinct ones).

The product of its digits is 7962624000, while the sum is 81.

The spelling of 8556856988832 in words is "eight trillion, five hundred fifty-six billion, eight hundred fifty-six million, nine hundred eighty-eight thousand, eight hundred thirty-two".