556681844 has 12 divisors (see below), whose sum is σ = 982815204. Its totient is φ = 275877504.

The previous prime is 556681841. The next prime is 556681859. The reversal of 556681844 is 448186655.

It can be written as a sum of positive squares in 2 ways, for example, as 98208100 + 458473744 = 9910^2 + 21412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556681841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615347 + ... + 616250.

It is an arithmetic number, because the mean of its divisors is an integer number (81901267).

Almost surely, 2^556681844 is an apocalyptic number.

It is an amenable number.

556681844 is a deficient number, since it is larger than the sum of its proper divisors (426133360).

556681844 is a wasteful number, since it uses less digits than its factorization.

556681844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231714 (or 1231712 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 556681844 is about 23594.1061284381. The cubic root of 556681844 is about 822.6258496835.

The spelling of 556681844 in words is "five hundred fifty-six million, six hundred eighty-one thousand, eight hundred forty-four".