12736864318 has 4 divisors (see below), whose sum is σ = 19105296480. Its totient is φ = 6368432158.

The previous prime is 12736864313. The next prime is 12736864333. The reversal of 12736864318 is 81346863721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81346863721 = 2777 ⋅29293073.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12736864313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3184216078 + ... + 3184216081.

It is an arithmetic number, because the mean of its divisors is an integer number (4776324120).

Almost surely, 2^12736864318 is an apocalyptic number.

12736864318 is a deficient number, since it is larger than the sum of its proper divisors (6368432162).

12736864318 is an equidigital number, since it uses as much as digits as its factorization.

12736864318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6368432161.

The product of its digits is 1161216, while the sum is 49.

The spelling of 12736864318 in words is "twelve billion, seven hundred thirty-six million, eight hundred sixty-four thousand, three hundred eighteen".