1311616554517 has 2 divisors, whose sum is σ = 1311616554518. Its totient is φ = 1311616554516.

The previous prime is 1311616554499. The next prime is 1311616554527. The reversal of 1311616554517 is 7154556161131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246547687121 + 65068867396 = 1116489^2 + 255086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311616554517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311616554527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655808277258 + 655808277259.

It is an arithmetic number, because the mean of its divisors is an integer number (655808277259).

Almost surely, 2^{1311616554517} is an apocalyptic number.

It is an amenable number.

1311616554517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311616554517 is an equidigital number, since it uses as much as digits as its factorization.

1311616554517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 46.

The spelling of 1311616554517 in words is "one trillion, three hundred eleven billion, six hundred sixteen million, five hundred fifty-four thousand, five hundred seventeen".