1361253667643 has 2 divisors, whose sum is σ = 1361253667644. Its totient is φ = 1361253667642.

The previous prime is 1361253667639. The next prime is 1361253667687. The reversal of 1361253667643 is 3467663521631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361253667643 - 2² = 1361253667639 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361253667043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680626833821 + 680626833822.

It is an arithmetic number, because the mean of its divisors is an integer number (680626833822).

Almost surely, 2^{1361253667643} is an apocalyptic number.

1361253667643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361253667643 is an equidigital number, since it uses as much as digits as its factorization.

1361253667643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 53.

The spelling of 1361253667643 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-seven thousand, six hundred forty-three".