1361253665999 has 2 divisors, whose sum is σ = 1361253666000. Its totient is φ = 1361253665998.

The previous prime is 1361253665963. The next prime is 1361253666083. The reversal of 1361253665999 is 9995663521631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361253665999 - 2¹² = 1361253661903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361253665939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680626832999 + 680626833000.

It is an arithmetic number, because the mean of its divisors is an integer number (680626833000).

Almost surely, 2^{1361253665999} is an apocalyptic number.

1361253665999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361253665999 is an equidigital number, since it uses as much as digits as its factorization.

1361253665999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70858800, while the sum is 65.

The spelling of 1361253665999 in words is "one trillion, three hundred sixty-one billion, two hundred fifty-three million, six hundred sixty-five thousand, nine hundred ninety-nine".