12736318784 has 56 divisors (see below), whose sum is σ = 29664842880. Its totient is φ = 5310890496.

The previous prime is 12736318781. The next prime is 12736318787. The reversal of 12736318784 is 48781363721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12736318781) and next prime (12736318787).

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12736318781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367604 + ... + 400755.

Almost surely, 2^12736318784 is an apocalyptic number.

12736318784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12736318784 is an abundant number, since it is smaller than the sum of its proper divisors (16928524096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12736318784 is an equidigital number, since it uses as much as digits as its factorization.

12736318784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768415 (or 768405 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 50.

The spelling of 12736318784 in words is "twelve billion, seven hundred thirty-six million, three hundred eighteen thousand, seven hundred eighty-four".