556656605617 has 16 divisors (see below), whose sum is σ = 638302154112. Its totient is φ = 475542288000.

The previous prime is 556656605611. The next prime is 556656605623. The reversal of 556656605617 is 716506656655.

It is an interprime number because it is at equal distance from previous prime (556656605611) and next prime (556656605623).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556656605617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556656605611) 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 15 ways as a sum of consecutive naturals, for example, 20991867 + ... + 21018367.

It is an arithmetic number, because the mean of its divisors is an integer number (39893884632).

Almost surely, 2^556656605617 is an apocalyptic number.

It is an amenable number.

556656605617 is a deficient number, since it is larger than the sum of its proper divisors (81645548495).

556656605617 is a wasteful number, since it uses less digits than its factorization.

556656605617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36408.

The product of its (nonzero) digits is 34020000, while the sum is 58.

The spelling of 556656605617 in words is "five hundred fifty-six billion, six hundred fifty-six million, six hundred five thousand, six hundred seventeen".