856253231568 has 120 divisors (see below), whose sum is σ = 2765766896256. Its totient is φ = 242221536000.

The previous prime is 856253231557. The next prime is 856253231573. The reversal of 856253231568 is 865132352658.

It is a happy number.

856253231568 is a `hidden beast` number, since 8 + 5 + 6 + 2 + 53 + 23 + 1 + 568 = 666.

It is a super-3 number, since 3×856253231568³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4103428 + ... + 4307043.

Almost surely, 2^856253231568 is an apocalyptic number.

It is an amenable number.

856253231568 is an abundant number, since it is smaller than the sum of its proper divisors (1909513664688).

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

856253231568 is a wasteful number, since it uses less digits than its factorization.

856253231568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410593 (or 8410584 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 54.

The spelling of 856253231568 in words is "eight hundred fifty-six billion, two hundred fifty-three million, two hundred thirty-one thousand, five hundred sixty-eight".