6563225856 has 108 divisors (see below), whose sum is σ = 19200363056. Its totient is φ = 1988828160.

The previous prime is 6563225843. The next prime is 6563225869. The reversal of 6563225856 is 6585223656.

It is an interprime number because it is at equal distance from previous prime (6563225843) and next prime (6563225869).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 57615 + ... + 128241.

Almost surely, 2^6563225856 is an apocalyptic number.

6563225856 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6563225856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9600181528).

6563225856 is an abundant number, since it is smaller than the sum of its proper divisors (12637137200).

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

6563225856 is a wasteful number, since it uses less digits than its factorization.

6563225856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70668 (or 70643 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 48.

The square root of 6563225856 is about 81013.7386867191. The cubic root of 6563225856 is about 1872.2871208371.

The spelling of 6563225856 in words is "six billion, five hundred sixty-three million, two hundred twenty-five thousand, eight hundred fifty-six".