8256568564 has 12 divisors (see below), whose sum is σ = 14523861604. Its totient is φ = 4106893824.

The previous prime is 8256568531. The next prime is 8256568591. The reversal of 8256568564 is 4658656528.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2093062500 + 6163506064 = 45750^2 + 78508^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5346747 + ... + 5348290.

Almost surely, 2^8256568564 is an apocalyptic number.

It is an amenable number.

8256568564 is a deficient number, since it is larger than the sum of its proper divisors (6267293040).

8256568564 is a wasteful number, since it uses less digits than its factorization.

8256568564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10695234 (or 10695232 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 55.

The square root of 8256568564 is about 90865.6621832472. The cubic root of 8256568564 is about 2021.1561335806.

The spelling of 8256568564 in words is "eight billion, two hundred fifty-six million, five hundred sixty-eight thousand, five hundred sixty-four".