2566859256 has 48 divisors (see below), whose sum is σ = 7486675560. Its totient is φ = 789802560.

The previous prime is 2566859249. The next prime is 2566859261. The reversal of 2566859256 is 6529586652.

2566859256 is a `hidden beast` number, since 2 + 566 + 8 + 59 + 25 + 6 = 666.

It is a super-2 number, since 2×2566859256² = 13177532880225747072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370250 + ... + 1372121.

Almost surely, 2^2566859256 is an apocalyptic number.

2566859256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2566859256 is an abundant number, since it is smaller than the sum of its proper divisors (4919816304).

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

2566859256 is a wasteful number, since it uses less digits than its factorization.

2566859256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742396 (or 2742389 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The square root of 2566859256 is about 50664.1811934230. The cubic root of 2566859256 is about 1369.2014555334.

The spelling of 2566859256 in words is "two billion, five hundred sixty-six million, eight hundred fifty-nine thousand, two hundred fifty-six".