556010561 has 4 divisors (see below), whose sum is σ = 556076592. Its totient is φ = 555944532.

The previous prime is 556010549. The next prime is 556010569. The reversal of 556010561 is 165010655.

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 556010561 - 2²⁶ = 488901697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (556010569) 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, 18155 + ... + 37968.

It is an arithmetic number, because the mean of its divisors is an integer number (139019148).

Almost surely, 2^556010561 is an apocalyptic number.

It is an amenable number.

556010561 is a deficient number, since it is larger than the sum of its proper divisors (66031).

556010561 is an equidigital number, since it uses as much as digits as its factorization.

556010561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66030.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 556010561 is about 23579.8761871219. The cubic root of 556010561 is about 822.2950581860.

The spelling of 556010561 in words is "five hundred fifty-six million, ten thousand, five hundred sixty-one".