556355409 has 4 divisors (see below), whose sum is σ = 741807216. Its totient is φ = 370903604.

The previous prime is 556355389. The next prime is 556355453. The reversal of 556355409 is 904553655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 556355409 - 2²³ = 547966801 is a prime.

It is a super-2 number, since 2×556355409² = 619062682247114562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (556350409) 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, 92725899 + ... + 92725904.

It is an arithmetic number, because the mean of its divisors is an integer number (185451804).

Almost surely, 2^556355409 is an apocalyptic number.

It is an amenable number.

556355409 is a deficient number, since it is larger than the sum of its proper divisors (185451807).

556355409 is a wasteful number, since it uses less digits than its factorization.

556355409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185451806.

The product of its (nonzero) digits is 405000, while the sum is 42.

The square root of 556355409 is about 23587.1873906153. The cubic root of 556355409 is about 822.4650239036.

The spelling of 556355409 in words is "five hundred fifty-six million, three hundred fifty-five thousand, four hundred nine".