556549056 has 280 divisors, whose sum is σ = 1930095200. Its totient is φ = 158505984.

The previous prime is 556549039. The next prime is 556549057. The reversal of 556549056 is 650945655.

556549056 is a `hidden beast` number, since 5 + 56 + 549 + 0 + 56 = 666.

It is a super-2 number, since 2×556549056² = 619493703468982272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556549057) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1777956 + ... + 1778268.

Almost surely, 2^556549056 is an apocalyptic number.

556549056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556549056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965047600).

556549056 is an abundant number, since it is smaller than the sum of its proper divisors (1373546144).

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

556549056 is an equidigital number, since it uses as much as digits as its factorization.

556549056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 556549056 is about 23591.2919527524. The cubic root of 556549056 is about 822.5604361808.

The spelling of 556549056 in words is "five hundred fifty-six million, five hundred forty-nine thousand, fifty-six".