556681365 has 12 divisors (see below), whose sum is σ = 964914444. Its totient is φ = 296896704.

The previous prime is 556681339. The next prime is 556681369. The reversal of 556681365 is 563186655.

556681365 is a `hidden beast` number, since 5 + 566 + 81 + 3 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 96707556 + 459973809 = 9834^2 + 21447^2 .

It is not a de Polignac number, because 556681365 - 2⁹ = 556680853 is a prime.

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: 12370697 = 556681365 / (5 + 5 + 6 + 6 + 8 + 1 + 3 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 556681365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556681369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6185304 + ... + 6185393.

It is an arithmetic number, because the mean of its divisors is an integer number (80409537).

Almost surely, 2^556681365 is an apocalyptic number.

It is an amenable number.

556681365 is a deficient number, since it is larger than the sum of its proper divisors (408233079).

556681365 is a wasteful number, since it uses less digits than its factorization.

556681365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12370708 (or 12370705 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 556681365 is about 23594.0959775958. The cubic root of 556681365 is about 822.6256137391.

The spelling of 556681365 in words is "five hundred fifty-six million, six hundred eighty-one thousand, three hundred sixty-five".