12783581816279 has 2 divisors, whose sum is σ = 12783581816280. Its totient is φ = 12783581816278.

The previous prime is 12783581816273. The next prime is 12783581816323. The reversal of 12783581816279 is 97261818538721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12783581816279 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12783581816273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6391790908139 + 6391790908140.

It is an arithmetic number, because the mean of its divisors is an integer number (6391790908140).

Almost surely, 2^{12783581816279} is an apocalyptic number.

12783581816279 is a deficient number, since it is larger than the sum of its proper divisors (1).

12783581816279 is an equidigital number, since it uses as much as digits as its factorization.

12783581816279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81285120, while the sum is 68.

The spelling of 12783581816279 in words is "twelve trillion, seven hundred eighty-three billion, five hundred eighty-one million, eight hundred sixteen thousand, two hundred seventy-nine".