1311241461643 has 2 divisors, whose sum is σ = 1311241461644. Its totient is φ = 1311241461642.

The previous prime is 1311241461631. The next prime is 1311241461653. The reversal of 1311241461643 is 3461641421131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311241461643 - 2²⁵ = 1311207907211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311241461623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655620730821 + 655620730822.

It is an arithmetic number, because the mean of its divisors is an integer number (655620730822).

Almost surely, 2^{1311241461643} is an apocalyptic number.

1311241461643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311241461643 is an equidigital number, since it uses as much as digits as its factorization.

1311241461643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

Adding to 1311241461643 its reverse (3461641421131), we get a palindrome (4772882882774).

The spelling of 1311241461643 in words is "one trillion, three hundred eleven billion, two hundred forty-one million, four hundred sixty-one thousand, six hundred forty-three".