8255861568 has 84 divisors (see below), whose sum is σ = 23850478080. Its totient is φ = 2730260736.

The previous prime is 8255861561. The next prime is 8255861591. The reversal of 8255861568 is 8651685528.

8255861568 is a `hidden beast` number, since 8 + 2 + 5 + 586 + 1 + 56 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255861561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16723 + ... + 129581.

Almost surely, 2^8255861568 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 8255861568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11925239040).

8255861568 is an abundant number, since it is smaller than the sum of its proper divisors (15594616512).

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

8255861568 is a wasteful number, since it uses less digits than its factorization.

8255861568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113004 (or 112991 counting only the distinct ones).

The product of its digits is 4608000, while the sum is 54.

The square root of 8255861568 is about 90861.7717634870. The cubic root of 8255861568 is about 2021.0984425403.

The spelling of 8255861568 in words is "eight billion, two hundred fifty-five million, eight hundred sixty-one thousand, five hundred sixty-eight".