12786965243 has 4 divisors (see below), whose sum is σ = 13770577968. Its totient is φ = 11803352520.

The previous prime is 12786965237. The next prime is 12786965251. The reversal of 12786965243 is 34256968721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34256968721 = 157 ⋅218197253.

It is a cyclic number.

It is not a de Polignac number, because 12786965243 - 2¹⁰ = 12786964219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12786967243) 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, 491806343 + ... + 491806368.

It is an arithmetic number, because the mean of its divisors is an integer number (3442644492).

Almost surely, 2^12786965243 is an apocalyptic number.

12786965243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12786965243 is a deficient number, since it is larger than the sum of its proper divisors (983612725).

12786965243 is an equidigital number, since it uses as much as digits as its factorization.

12786965243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983612724.

The product of its digits is 4354560, while the sum is 53.

The spelling of 12786965243 in words is "twelve billion, seven hundred eighty-six million, nine hundred sixty-five thousand, two hundred forty-three".