856564683688 has 192 divisors, whose sum is σ = 2024648317440. Its totient is φ = 337419565056.

The previous prime is 856564683677. The next prime is 856564683713. The reversal of 856564683688 is 886386465658.

It is a self number, because there is not a number n which added to its sum of digits gives 856564683688.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157540906 + ... + 157546342.

It is an arithmetic number, because the mean of its divisors is an integer number (10545043320).

Almost surely, 2^856564683688 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 856564683688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012324158720).

856564683688 is an abundant number, since it is smaller than the sum of its proper divisors (1168083633752).

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

856564683688 is a wasteful number, since it uses less digits than its factorization.

856564683688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6024 (or 6013 counting only the distinct ones).

The product of its digits is 1592524800, while the sum is 73.

The spelling of 856564683688 in words is "eight hundred fifty-six billion, five hundred sixty-four million, six hundred eighty-three thousand, six hundred eighty-eight".