556556520 has 128 divisors (see below), whose sum is σ = 1808231040. Its totient is φ = 136227840.

The previous prime is 556556519. The next prime is 556556537. The reversal of 556556520 is 25655655.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306415 + ... + 308225.

It is an arithmetic number, because the mean of its divisors is an integer number (14126805).

Almost surely, 2^556556520 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 556556520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904115520).

556556520 is an abundant number, since it is smaller than the sum of its proper divisors (1251674520).

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

556556520 is a wasteful number, since it uses less digits than its factorization.

556556520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2031 counting only the distinct ones).

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

The square root of 556556520 is about 23591.4501461864. The cubic root of 556556520 is about 822.5641133431.

The spelling of 556556520 in words is "five hundred fifty-six million, five hundred fifty-six thousand, five hundred twenty".