6563220256 has 24 divisors (see below), whose sum is σ = 12934627020. Its totient is φ = 3278235648.

The previous prime is 6563220227. The next prime is 6563220317. The reversal of 6563220256 is 6520223656.

It can be written as a sum of positive squares in 2 ways, for example, as 5095104400 + 1468115856 = 71380^2 + 38316^2 .

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, 73701 + ... + 136228.

Almost surely, 2^6563220256 is an apocalyptic number.

It is an amenable number.

6563220256 is a deficient number, since it is larger than the sum of its proper divisors (6371406764).

6563220256 is a wasteful number, since it uses less digits than its factorization.

6563220256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210916 (or 210908 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 6563220256 is about 81013.7041246726. The cubic root of 6563220256 is about 1872.2865883341.

The spelling of 6563220256 in words is "six billion, five hundred sixty-three million, two hundred twenty thousand, two hundred fifty-six".