856656125776 has 80 divisors (see below), whose sum is σ = 1901897699328. Its totient is φ = 369992304000.

The previous prime is 856656125771. The next prime is 856656125779. The reversal of 856656125776 is 677521656658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856656125771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89496 + ... + 1311991.

Almost surely, 2^856656125776 is an apocalyptic number.

It is an amenable number.

856656125776 is an abundant number, since it is smaller than the sum of its proper divisors (1045241573552).

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

856656125776 is a wasteful number, since it uses less digits than its factorization.

856656125776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401680 (or 1401674 counting only the distinct ones).

The product of its digits is 127008000, while the sum is 64.

The spelling of 856656125776 in words is "eight hundred fifty-six billion, six hundred fifty-six million, one hundred twenty-five thousand, seven hundred seventy-six".