563964856 has 64 divisors (see below), whose sum is σ = 1346385600. Its totient is φ = 215405568.

The previous prime is 563964829. The next prime is 563964871. The reversal of 563964856 is 658469365.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7756 + ... + 34468.

It is an arithmetic number, because the mean of its divisors is an integer number (21037275).

Almost surely, 2^563964856 is an apocalyptic number.

563964856 is a gapful number since it is divisible by the number (56) 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 563964856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673192800).

563964856 is an abundant number, since it is smaller than the sum of its proper divisors (782420744).

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

563964856 is a wasteful number, since it uses less digits than its factorization.

563964856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26768 (or 26764 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 52.

The square root of 563964856 is about 23747.9442478712. The cubic root of 563964856 is about 826.1977611597.

The spelling of 563964856 in words is "five hundred sixty-three million, nine hundred sixty-four thousand, eight hundred fifty-six".