1361326105691 has 2 divisors, whose sum is σ = 1361326105692. Its totient is φ = 1361326105690.

The previous prime is 1361326105679. The next prime is 1361326105693. The reversal of 1361326105691 is 1965016231631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361326105691 - 2³⁰ = 1360252363867 is a prime.

Together with 1361326105693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1361326105693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680663052845 + 680663052846.

It is an arithmetic number, because the mean of its divisors is an integer number (680663052846).

Almost surely, 2^{1361326105691} is an apocalyptic number.

1361326105691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361326105691 is an equidigital number, since it uses as much as digits as its factorization.

1361326105691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 1361326105691 in words is "one trillion, three hundred sixty-one billion, three hundred twenty-six million, one hundred five thousand, six hundred ninety-one".