556361572221 has 288 divisors, whose sum is σ = 1055219343360. Its totient is φ = 276212851200.

The previous prime is 556361572189. The next prime is 556361572223. The reversal of 556361572221 is 122275163655.

It is a happy number.

556361572221 is a `hidden beast` number, since 5 + 5 + 6 + 3 + 615 + 7 + 2 + 2 + 21 = 666.

It is not a de Polignac number, because 556361572221 - 2⁵ = 556361572189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556361572223) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3073820751 + ... + 3073820931.

Almost surely, 2^556361572221 is an apocalyptic number.

It is an amenable number.

556361572221 is a deficient number, since it is larger than the sum of its proper divisors (498857771139).

556361572221 is a wasteful number, since it uses less digits than its factorization.

556361572221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 441 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The spelling of 556361572221 in words is "five hundred fifty-six billion, three hundred sixty-one million, five hundred seventy-two thousand, two hundred twenty-one".