556118401 has 2 divisors, whose sum is σ = 556118402. Its totient is φ = 556118400.

The previous prime is 556118377. The next prime is 556118417. The reversal of 556118401 is 104811655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405418225 + 150700176 = 20135^2 + 12276^2 .

It is a cyclic number.

It is not a de Polignac number, because 556118401 - 2¹⁵ = 556085633 is a prime.

It is not a weakly prime, because it can be changed into another prime (556118461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278059200 + 278059201.

It is an arithmetic number, because the mean of its divisors is an integer number (278059201).

Almost surely, 2^556118401 is an apocalyptic number.

It is an amenable number.

556118401 is a deficient number, since it is larger than the sum of its proper divisors (1).

556118401 is an equidigital number, since it uses as much as digits as its factorization.

556118401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 556118401 is about 23582.1627718918. The cubic root of 556118401 is about 822.3482169884.

The spelling of 556118401 in words is "five hundred fifty-six million, one hundred eighteen thousand, four hundred one".