1311616513709 has 2 divisors, whose sum is σ = 1311616513710. Its totient is φ = 1311616513708.

The previous prime is 1311616513661. The next prime is 1311616513777. The reversal of 1311616513709 is 9073156161131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256484064900 + 55132448809 = 1120930^2 + 234803^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311616513709 - 2¹² = 1311616509613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311616513709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311616513609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655808256854 + 655808256855.

It is an arithmetic number, because the mean of its divisors is an integer number (655808256855).

Almost surely, 2^{1311616513709} is an apocalyptic number.

It is an amenable number.

1311616513709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311616513709 is an equidigital number, since it uses as much as digits as its factorization.

1311616513709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The spelling of 1311616513709 in words is "one trillion, three hundred eleven billion, six hundred sixteen million, five hundred thirteen thousand, seven hundred nine".