556620543121 has 24 divisors (see below), whose sum is σ = 610772870400. Its totient is φ = 506641508640.

The previous prime is 556620543119. The next prime is 556620543179. The reversal of 556620543121 is 121345026655.

It is not a de Polignac number, because 556620543121 - 2¹ = 556620543119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556620544121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1376635 + ... + 1734463.

It is an arithmetic number, because the mean of its divisors is an integer number (25448869600).

Almost surely, 2^556620543121 is an apocalyptic number.

It is an amenable number.

556620543121 is a deficient number, since it is larger than the sum of its proper divisors (54152327279).

556620543121 is a wasteful number, since it uses less digits than its factorization.

556620543121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358037 (or 358018 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

Adding to 556620543121 its reverse (121345026655), we get a palindrome (677965569776).

The spelling of 556620543121 in words is "five hundred fifty-six billion, six hundred twenty million, five hundred forty-three thousand, one hundred twenty-one".