5256566280 has 384 divisors, whose sum is σ = 21134131200. Its totient is φ = 1148919552.

The previous prime is 5256566279. The next prime is 5256566291. The reversal of 5256566280 is 826656525.

5256566280 is a `hidden beast` number, since 5 + 2 + 5 + 6 + 566 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1563241 + ... + 1566599.

It is an arithmetic number, because the mean of its divisors is an integer number (55036800).

Almost surely, 2^5256566280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5256566280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10567065600).

5256566280 is an abundant number, since it is smaller than the sum of its proper divisors (15877564920).

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

5256566280 is a wasteful number, since it uses less digits than its factorization.

5256566280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The square root of 5256566280 is about 72502.1812085678. The cubic root of 5256566280 is about 1738.7376099077.

It can be divided in two parts, 5256 and 566280, that added together give a square (571536 = 756²).

The spelling of 5256566280 in words is "five billion, two hundred fifty-six million, five hundred sixty-six thousand, two hundred eighty".