556544720 has 20 divisors (see below), whose sum is σ = 1293966660. Its totient is φ = 222617856.

The previous prime is 556544707. The next prime is 556544749. The reversal of 556544720 is 27445655.

It can be written as a sum of positive squares in 2 ways, for example, as 356152384 + 200392336 = 18872^2 + 14156^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3478325 + ... + 3478484.

It is an arithmetic number, because the mean of its divisors is an integer number (64698333).

Almost surely, 2^556544720 is an apocalyptic number.

It is an amenable number.

556544720 is an abundant number, since it is smaller than the sum of its proper divisors (737421940).

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

556544720 is a wasteful number, since it uses less digits than its factorization.

556544720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956822 (or 6956816 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 38.

The square root of 556544720 is about 23591.2000542575. The cubic root of 556544720 is about 822.5583000221.

The spelling of 556544720 in words is "five hundred fifty-six million, five hundred forty-four thousand, seven hundred twenty".