556258609 has 4 divisors (see below), whose sum is σ = 556372516. Its totient is φ = 556144704.

The previous prime is 556258567. The next prime is 556258627. The reversal of 556258609 is 906852655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906852655 = 5 ⋅181370531.

It can be written as a sum of positive squares in 2 ways, for example, as 129960000 + 426298609 = 11400^2 + 20647^2 .

It is a cyclic number.

It is not a de Polignac number, because 556258609 - 2⁹ = 556258097 is a prime.

It is a super-2 number, since 2×556258609² = 618847280173229762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556258639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49284 + ... + 59509.

It is an arithmetic number, because the mean of its divisors is an integer number (139093129).

Almost surely, 2^556258609 is an apocalyptic number.

It is an amenable number.

556258609 is a deficient number, since it is larger than the sum of its proper divisors (113907).

556258609 is a wasteful number, since it uses less digits than its factorization.

556258609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113906.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 556258609 is about 23585.1353398703. The cubic root of 556258609 is about 822.4173210438.

The spelling of 556258609 in words is "five hundred fifty-six million, two hundred fifty-eight thousand, six hundred nine".