12781823675723 has 2 divisors, whose sum is σ = 12781823675724. Its totient is φ = 12781823675722.

The previous prime is 12781823675693. The next prime is 12781823675767. The reversal of 12781823675723 is 32757632818721.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12781823675723 is a prime.

It is not a weakly prime, because it can be changed into another prime (12781823675783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390911837861 + 6390911837862.

It is an arithmetic number, because the mean of its divisors is an integer number (6390911837862).

Almost surely, 2^{12781823675723} is an apocalyptic number.

12781823675723 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781823675723 is an equidigital number, since it uses as much as digits as its factorization.

12781823675723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47416320, while the sum is 62.

The spelling of 12781823675723 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred twenty-three million, six hundred seventy-five thousand, seven hundred twenty-three".