556599816 has 128 divisors (see below), whose sum is σ = 1624320000. Its totient is φ = 176261184.

The previous prime is 556599767. The next prime is 556599829. The reversal of 556599816 is 618995655.

556599816 is a `hidden beast` number, since 556 + 5 + 9 + 9 + 81 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

Its product of digits (2916000) is a multiple of the sum of its prime factors (800).

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, 988351 + ... + 988913.

It is an arithmetic number, because the mean of its divisors is an integer number (12690000).

Almost surely, 2^556599816 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 556599816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812160000).

556599816 is an abundant number, since it is smaller than the sum of its proper divisors (1067720184).

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

556599816 is a wasteful number, since it uses less digits than its factorization.

556599816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 790 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 54.

The square root of 556599816 is about 23592.3677489141. The cubic root of 556599816 is about 822.5854426009.

The spelling of 556599816 in words is "five hundred fifty-six million, five hundred ninety-nine thousand, eight hundred sixteen".