855995856 has 20 divisors (see below), whose sum is σ = 2211322752. Its totient is φ = 285331936.

The previous prime is 855995837. The next prime is 855995863. The reversal of 855995856 is 658599558.

It is a self number, because there is not a number n which added to its sum of digits gives 855995856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8916576 + ... + 8916671.

Almost surely, 2^855995856 is an apocalyptic number.

It is an amenable number.

855995856 is an abundant number, since it is smaller than the sum of its proper divisors (1355326896).

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

855995856 is a wasteful number, since it uses less digits than its factorization.

855995856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17833258 (or 17833252 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 60.

The square root of 855995856 is about 29257.4068570678. The cubic root of 855995856 is about 949.4903475004.

The spelling of 855995856 in words is "eight hundred fifty-five million, nine hundred ninety-five thousand, eight hundred fifty-six".