855557568 has 84 divisors (see below), whose sum is σ = 2474981080. Its totient is φ = 282548736.

The previous prime is 855557531. The next prime is 855557581. The reversal of 855557568 is 865755558.

It is a happy number.

855557568 is a `hidden beast` number, since 8 + 5 + 5 + 5 + 575 + 68 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55971 + ... + 69597.

Almost surely, 2^855557568 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 855557568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237490540).

855557568 is an abundant number, since it is smaller than the sum of its proper divisors (1619423512).

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

855557568 is a wasteful number, since it uses less digits than its factorization.

855557568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13754 (or 13741 counting only the distinct ones).

The product of its digits is 8400000, while the sum is 54.

The square root of 855557568 is about 29249.9156921862. The cubic root of 855557568 is about 949.3282667813.

The spelling of 855557568 in words is "eight hundred fifty-five million, five hundred fifty-seven thousand, five hundred sixty-eight".