556558929855656 has 64 divisors (see below), whose sum is σ = 1284413543911680. Its totient is φ = 220169139171840.

The previous prime is 556558929855601. The next prime is 556558929855679. The reversal of 556558929855656 is 656558929855655.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6096485 + ... + 33915851.

It is an arithmetic number, because the mean of its divisors is an integer number (20068961623620).

Almost surely, 2^{556558929855656} is an apocalyptic number.

556558929855656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

556558929855656 is an abundant number, since it is smaller than the sum of its proper divisors (727854614056024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

556558929855656 is a wasteful number, since it uses less digits than its factorization.

556558929855656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27846874 (or 27846870 counting only the distinct ones).

The product of its digits is 174960000000, while the sum is 89.

Subtracting 556558929855656 from its reverse (656558929855655), we obtain a palindrome (99999999999999).

The spelling of 556558929855656 in words is "five hundred fifty-six trillion, five hundred fifty-eight billion, nine hundred twenty-nine million, eight hundred fifty-five thousand, six hundred fifty-six".