556121478449 has 2 divisors, whose sum is σ = 556121478450. Its totient is φ = 556121478448.

The previous prime is 556121478439. The next prime is 556121478467. The reversal of 556121478449 is 944874121655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484738997824 + 71382480625 = 696232^2 + 267175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556121478449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 556121478394 and 556121478403.

It is not a weakly prime, because it can be changed into another prime (556121478439) 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 as a sum of consecutive naturals, namely, 278060739224 + 278060739225.

It is an arithmetic number, because the mean of its divisors is an integer number (278060739225).

Almost surely, 2^556121478449 is an apocalyptic number.

It is an amenable number.

556121478449 is a deficient number, since it is larger than the sum of its proper divisors (1).

556121478449 is an equidigital number, since it uses as much as digits as its factorization.

556121478449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9676800, while the sum is 56.

The spelling of 556121478449 in words is "five hundred fifty-six billion, one hundred twenty-one million, four hundred seventy-eight thousand, four hundred forty-nine".