556565520 has 160 divisors (see below), whose sum is σ = 2012371200. Its totient is φ = 127196160.

The previous prime is 556565509. The next prime is 556565539. The reversal of 556565520 is 25565655.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78940 + ... + 85700.

It is an arithmetic number, because the mean of its divisors is an integer number (12577320).

Almost surely, 2^556565520 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 556565520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006185600).

556565520 is an abundant number, since it is smaller than the sum of its proper divisors (1455805680).

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

556565520 is a wasteful number, since it uses less digits than its factorization.

556565520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 39.

The square root of 556565520 is about 23591.6408924856. The cubic root of 556565520 is about 822.5685471768.

The spelling of 556565520 in words is "five hundred fifty-six million, five hundred sixty-five thousand, five hundred twenty".