556185645 has 12 divisors (see below), whose sum is σ = 964055196. Its totient is φ = 296632320.

The previous prime is 556185631. The next prime is 556185649. The reversal of 556185645 is 546581655.

556185645 is a `hidden beast` number, since 5 + 561 + 85 + 6 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 254051721 + 302133924 = 15939^2 + 17382^2 .

It is not a de Polignac number, because 556185645 - 2¹¹ = 556183597 is a prime.

It is a super-3 number, since 3×556185645³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 12359681 = 556185645 / (5 + 5 + 6 + 1 + 8 + 5 + 6 + 4 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556185645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556185649) 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 11 ways as a sum of consecutive naturals, for example, 6179796 + ... + 6179885.

It is an arithmetic number, because the mean of its divisors is an integer number (80337933).

Almost surely, 2^556185645 is an apocalyptic number.

It is an amenable number.

556185645 is a deficient number, since it is larger than the sum of its proper divisors (407869551).

556185645 is a wasteful number, since it uses less digits than its factorization.

556185645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359692 (or 12359689 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 556185645 is about 23583.5884674067. The cubic root of 556185645 is about 822.3813608625.

The spelling of 556185645 in words is "five hundred fifty-six million, one hundred eighty-five thousand, six hundred forty-five".