1311263635343 has 2 divisors, whose sum is σ = 1311263635344. Its totient is φ = 1311263635342.

The previous prime is 1311263635303. The next prime is 1311263635349. The reversal of 1311263635343 is 3435363621131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311263635343 - 2³⁶ = 1242544158607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311263635343.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311263635349) 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, 655631817671 + 655631817672.

It is an arithmetic number, because the mean of its divisors is an integer number (655631817672).

Almost surely, 2^{1311263635343} is an apocalyptic number.

1311263635343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311263635343 is an equidigital number, since it uses as much as digits as its factorization.

1311263635343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 41.

The spelling of 1311263635343 in words is "one trillion, three hundred eleven billion, two hundred sixty-three million, six hundred thirty-five thousand, three hundred forty-three".