556521556 has 12 divisors (see below), whose sum is σ = 980450100. Its totient is φ = 276392960.

The previous prime is 556521529. The next prime is 556521611. The reversal of 556521556 is 655125655.

It can be written as a sum of positive squares in 2 ways, for example, as 233600656 + 322920900 = 15284^2 + 17970^2 .

It is a super-2 number, since 2×556521556² = 619432484585322272, which contains 22 as substring.

It is a congruent number.

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, 466285 + ... + 467476.

It is an arithmetic number, because the mean of its divisors is an integer number (81704175).

Almost surely, 2^556521556 is an apocalyptic number.

It is an amenable number.

556521556 is a deficient number, since it is larger than the sum of its proper divisors (423928544).

556521556 is a wasteful number, since it uses less digits than its factorization.

556521556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933914 (or 933912 counting only the distinct ones).

The product of its digits is 225000, while the sum is 40.

The square root of 556521556 is about 23590.7091033737. The cubic root of 556521556 is about 822.5468879384.

The spelling of 556521556 in words is "five hundred fifty-six million, five hundred twenty-one thousand, five hundred fifty-six".