556808399 has 4 divisors (see below), whose sum is σ = 636352464. Its totient is φ = 477264336.

The previous prime is 556808393. The next prime is 556808401. The reversal of 556808399 is 993808655.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 556808399 - 2¹⁶ = 556742863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556808399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556808393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39772022 + ... + 39772035.

It is an arithmetic number, because the mean of its divisors is an integer number (159088116).

Almost surely, 2^556808399 is an apocalyptic number.

556808399 is a deficient number, since it is larger than the sum of its proper divisors (79544065).

556808399 is an equidigital number, since it uses as much as digits as its factorization.

556808399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79544064.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The square root of 556808399 is about 23596.7878958133. The cubic root of 556808399 is about 822.6881830297.

The spelling of 556808399 in words is "five hundred fifty-six million, eight hundred eight thousand, three hundred ninety-nine".