556550556 has 48 divisors (see below), whose sum is σ = 1383844896. Its totient is φ = 173481984.

The previous prime is 556550551. The next prime is 556550563. The reversal of 556550556 is 655055655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556550551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23340 + ... + 40716.

It is an arithmetic number, because the mean of its divisors is an integer number (28830102).

Almost surely, 2^556550556 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 556550556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691922448).

556550556 is an abundant number, since it is smaller than the sum of its proper divisors (827294340).

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

556550556 is a wasteful number, since it uses less digits than its factorization.

556550556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17558 (or 17556 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 42.

The square root of 556550556 is about 23591.3237441225. The cubic root of 556550556 is about 822.5611751630.

The spelling of 556550556 in words is "five hundred fifty-six million, five hundred fifty thousand, five hundred fifty-six".