556256261121 has 32 divisors (see below), whose sum is σ = 830901891456. Its totient is φ = 328081920000.

The previous prime is 556256261083. The next prime is 556256261173. The reversal of 556256261121 is 121162652655.

It is not a de Polignac number, because 556256261121 - 2²² = 556252066817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556256261221) 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, 29925 + ... + 1055181.

It is an arithmetic number, because the mean of its divisors is an integer number (25965684108).

Almost surely, 2^556256261121 is an apocalyptic number.

It is an amenable number.

556256261121 is a deficient number, since it is larger than the sum of its proper divisors (274645630335).

556256261121 is a wasteful number, since it uses less digits than its factorization.

556256261121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025713.

The product of its digits is 216000, while the sum is 42.

The spelling of 556256261121 in words is "five hundred fifty-six billion, two hundred fifty-six million, two hundred sixty-one thousand, one hundred twenty-one".