556515056661 has 4 divisors (see below), whose sum is σ = 742020075552. Its totient is φ = 371010037772.

The previous prime is 556515056659. The next prime is 556515056707. The reversal of 556515056661 is 166650515655.

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 556515056661 - 2¹ = 556515056659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556515056621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92752509441 + ... + 92752509446.

It is an arithmetic number, because the mean of its divisors is an integer number (185505018888).

Almost surely, 2^556515056661 is an apocalyptic number.

It is an amenable number.

556515056661 is a deficient number, since it is larger than the sum of its proper divisors (185505018891).

556515056661 is a wasteful number, since it uses less digits than its factorization.

556515056661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185505018890.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 556515056661 in words is "five hundred fifty-six billion, five hundred fifteen million, fifty-six thousand, six hundred sixty-one".