636320104313 has 4 divisors (see below), whose sum is σ = 636948259428. Its totient is φ = 635691949200.

The previous prime is 636320104289. The next prime is 636320104351. The reversal of 636320104313 is 313401023636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286864146409 + 349455957904 = 535597^2 + 591148^2 .

It is a cyclic number.

It is not a de Polignac number, because 636320104313 - 2¹² = 636320100217 is a prime.

It is a Duffinian number.

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 636320104313.

It is not an unprimeable number, because it can be changed into a prime (636320104513) 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, 314076038 + ... + 314078063.

It is an arithmetic number, because the mean of its divisors is an integer number (159237064857).

Almost surely, 2^636320104313 is an apocalyptic number.

It is an amenable number.

636320104313 is a deficient number, since it is larger than the sum of its proper divisors (628155115).

636320104313 is a wasteful number, since it uses less digits than its factorization.

636320104313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628155114.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 636320104313 its reverse (313401023636), we get a palindrome (949721127949).

The spelling of 636320104313 in words is "six hundred thirty-six billion, three hundred twenty million, one hundred four thousand, three hundred thirteen".