556551656 has 16 divisors (see below), whose sum is σ = 1043923140. Its totient is φ = 278172160.

The previous prime is 556551643. The next prime is 556551683. The reversal of 556551656 is 656155655.

It can be written as a sum of positive squares in 2 ways, for example, as 409414756 + 147136900 = 20234^2 + 12130^2 .

It is an unprimeable number.

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, 12890 + ... + 35766.

Almost surely, 2^556551656 is an apocalyptic number.

It is an amenable number.

556551656 is a deficient number, since it is larger than the sum of its proper divisors (487371484).

556551656 is a wasteful number, since it uses less digits than its factorization.

556551656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25924 (or 25920 counting only the distinct ones).

The product of its digits is 675000, while the sum is 44.

The square root of 556551656 is about 23591.3470577668. The cubic root of 556551656 is about 822.5617170825.

The spelling of 556551656 in words is "five hundred fifty-six million, five hundred fifty-one thousand, six hundred fifty-six".