7709135090861 has 2 divisors, whose sum is σ = 7709135090862. Its totient is φ = 7709135090860.

The previous prime is 7709135090807. The next prime is 7709135090879. The reversal of 7709135090861 is 1680905319077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7690532858761 + 18602232100 = 2773181^2 + 136390^2 .

It is an emirp because it is prime and its reverse (1680905319077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7709135090861 - 2³⁸ = 7434257183917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7709135090797 and 7709135090806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7709135090161) 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, 3854567545430 + 3854567545431.

It is an arithmetic number, because the mean of its divisors is an integer number (3854567545431).

Almost surely, 2^{7709135090861} is an apocalyptic number.

It is an amenable number.

7709135090861 is a deficient number, since it is larger than the sum of its proper divisors (1).

7709135090861 is an equidigital number, since it uses as much as digits as its factorization.

7709135090861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 7709135090861 in words is "seven trillion, seven hundred nine billion, one hundred thirty-five million, ninety thousand, eight hundred sixty-one".