12781823675747 has 18 divisors (see below), whose sum is σ = 15399043948548. Its totient is φ = 10578060938928.

The previous prime is 12781823675723. The next prime is 12781823675767. The reversal of 12781823675747 is 74757632818721.

It is not a de Polignac number, because 12781823675747 - 2¹⁸ = 12781823413603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12781823675767) 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 in 17 ways as a sum of consecutive naturals, for example, 155044133 + ... + 155126550.

It is an arithmetic number, because the mean of its divisors is an integer number (855502441586).

Almost surely, 2^{12781823675747} is an apocalyptic number.

12781823675747 is a deficient number, since it is larger than the sum of its proper divisors (2617220272801).

12781823675747 is an equidigital number, since it uses as much as digits as its factorization.

12781823675747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310170755 (or 310170719 counting only the distinct ones).

The product of its digits is 221276160, while the sum is 68.

The spelling of 12781823675747 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred twenty-three million, six hundred seventy-five thousand, seven hundred forty-seven".