556712561 has 4 divisors (see below), whose sum is σ = 557661552. Its totient is φ = 555763572.

The previous prime is 556712557. The next prime is 556712593. The reversal of 556712561 is 165217655.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165217655 = 5 ⋅33043531.

It is a cyclic number.

It is not a de Polignac number, because 556712561 - 2² = 556712557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556712161) 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, 473615 + ... + 474788.

It is an arithmetic number, because the mean of its divisors is an integer number (139415388).

Almost surely, 2^556712561 is an apocalyptic number.

It is an amenable number.

556712561 is a deficient number, since it is larger than the sum of its proper divisors (948991).

556712561 is an equidigital number, since it uses as much as digits as its factorization.

556712561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948990.

The product of its digits is 63000, while the sum is 38.

The square root of 556712561 is about 23594.7570659246. The cubic root of 556712561 is about 822.6409798898.

The spelling of 556712561 in words is "five hundred fifty-six million, seven hundred twelve thousand, five hundred sixty-one".