556808401 has 2 divisors, whose sum is σ = 556808402. Its totient is φ = 556808400.

The previous prime is 556808393. The next prime is 556808431. The reversal of 556808401 is 104808655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 464187025 + 92621376 = 21545^2 + 9624^2 .

It is a cyclic number.

It is not a de Polignac number, because 556808401 - 2³ = 556808393 is a prime.

It is not a weakly prime, because it can be changed into another prime (556808431) 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, 278404200 + 278404201.

It is an arithmetic number, because the mean of its divisors is an integer number (278404201).

Almost surely, 2^556808401 is an apocalyptic number.

It is an amenable number.

556808401 is a deficient number, since it is larger than the sum of its proper divisors (1).

556808401 is an equidigital number, since it uses as much as digits as its factorization.

556808401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 556808401 is about 23596.7879381919. The cubic root of 556808401 is about 822.6881840147.

The spelling of 556808401 in words is "five hundred fifty-six million, eight hundred eight thousand, four hundred one".