12781823413603 has 2 divisors, whose sum is σ = 12781823413604. Its totient is φ = 12781823413602.

The previous prime is 12781823413589. The next prime is 12781823413607. The reversal of 12781823413603 is 30631432818721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12781823413603 - 2²⁹ = 12781286542691 is a prime.

It is not a weakly prime, because it can be changed into another prime (12781823413607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6390911706801 + 6390911706802.

It is an arithmetic number, because the mean of its divisors is an integer number (6390911706802).

Almost surely, 2^{12781823413603} is an apocalyptic number.

12781823413603 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781823413603 is an equidigital number, since it uses as much as digits as its factorization.

12781823413603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 12781823413603 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred twenty-three million, four hundred thirteen thousand, six hundred three".