12864313138 has 4 divisors (see below), whose sum is σ = 19296469710. Its totient is φ = 6432156568.

The previous prime is 12864313129. The next prime is 12864313157. The reversal of 12864313138 is 83131346821.

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

It can be written as a sum of positive squares in only one way, i.e., 12838476249 + 25836889 = 113307^2 + 5083^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12864313138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216078283 + ... + 3216078286.

Almost surely, 2^12864313138 is an apocalyptic number.

12864313138 is a deficient number, since it is larger than the sum of its proper divisors (6432156572).

12864313138 is an equidigital number, since it uses as much as digits as its factorization.

12864313138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6432156571.

The product of its digits is 82944, while the sum is 40.

Adding to 12864313138 its reverse (83131346821), we get a palindrome (95995659959).

The spelling of 12864313138 in words is "twelve billion, eight hundred sixty-four million, three hundred thirteen thousand, one hundred thirty-eight".