556845861 has 32 divisors (see below), whose sum is σ = 876072960. Its totient is φ = 310161600.

The previous prime is 556845859. The next prime is 556845899. The reversal of 556845861 is 168548655.

It is not a de Polignac number, because 556845861 - 2¹ = 556845859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556845861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556845841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99816 + ... + 105246.

It is an arithmetic number, because the mean of its divisors is an integer number (27377280).

Almost surely, 2^556845861 is an apocalyptic number.

It is an amenable number.

556845861 is a deficient number, since it is larger than the sum of its proper divisors (319227099).

556845861 is a wasteful number, since it uses less digits than its factorization.

556845861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697.

The product of its digits is 1152000, while the sum is 48.

The square root of 556845861 is about 23597.5816769431. The cubic root of 556845861 is about 822.7066327355.

The spelling of 556845861 in words is "five hundred fifty-six million, eight hundred forty-five thousand, eight hundred sixty-one".