556661056117 has 4 divisors (see below), whose sum is σ = 557083090080. Its totient is φ = 556239022156.

The previous prime is 556661056097. The next prime is 556661056123. The reversal of 556661056117 is 711650166655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 556661056117 - 2¹⁵ = 556661023349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556661056717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211015003 + ... + 211017640.

It is an arithmetic number, because the mean of its divisors is an integer number (139270772520).

Almost surely, 2^556661056117 is an apocalyptic number.

It is an amenable number.

556661056117 is a deficient number, since it is larger than the sum of its proper divisors (422033963).

556661056117 is a wasteful number, since it uses less digits than its factorization.

556661056117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422033962.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 556661056117 in words is "five hundred fifty-six billion, six hundred sixty-one million, fifty-six thousand, one hundred seventeen".