1311660167591 has 2 divisors, whose sum is σ = 1311660167592. Its totient is φ = 1311660167590.

The previous prime is 1311660167581. The next prime is 1311660167611. The reversal of 1311660167591 is 1957610661131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311660167591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311660167581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655830083795 + 655830083796.

It is an arithmetic number, because the mean of its divisors is an integer number (655830083796).

Almost surely, 2^{1311660167591} is an apocalyptic number.

1311660167591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311660167591 is an equidigital number, since it uses as much as digits as its factorization.

1311660167591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 47.

The spelling of 1311660167591 in words is "one trillion, three hundred eleven billion, six hundred sixty million, one hundred sixty-seven thousand, five hundred ninety-one".