1311643046243 has 2 divisors, whose sum is σ = 1311643046244. Its totient is φ = 1311643046242.

The previous prime is 1311643046237. The next prime is 1311643046261. The reversal of 1311643046243 is 3426403461131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311643046243 - 2⁴ = 1311643046227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311643046197 and 1311643046206.

It is not a weakly prime, because it can be changed into another prime (1311643046293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655821523121 + 655821523122.

It is an arithmetic number, because the mean of its divisors is an integer number (655821523122).

Almost surely, 2^{1311643046243} is an apocalyptic number.

1311643046243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311643046243 is an equidigital number, since it uses as much as digits as its factorization.

1311643046243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 1311643046243 in words is "one trillion, three hundred eleven billion, six hundred forty-three million, forty-six thousand, two hundred forty-three".