556688945 has 8 divisors (see below), whose sum is σ = 680631336. Its totient is φ = 436948096.

The previous prime is 556688921. The next prime is 556688947. The reversal of 556688945 is 549886655.

It can be written as a sum of positive squares in 4 ways, for example, as 2745649 + 553943296 = 1657^2 + 23536^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556688945 - 2⁸ = 556688689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556688947) 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 7 ways as a sum of consecutive naturals, for example, 1050092 + ... + 1050621.

It is an arithmetic number, because the mean of its divisors is an integer number (85078917).

Almost surely, 2^556688945 is an apocalyptic number.

It is an amenable number.

556688945 is a deficient number, since it is larger than the sum of its proper divisors (123942391).

556688945 is a wasteful number, since it uses less digits than its factorization.

556688945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100771.

The product of its digits is 10368000, while the sum is 56.

The square root of 556688945 is about 23594.2566104550. The cubic root of 556688945 is about 822.6293474572.

The spelling of 556688945 in words is "five hundred fifty-six million, six hundred eighty-eight thousand, nine hundred forty-five".