11771765947717 has 2 divisors, whose sum is σ = 11771765947718. Its totient is φ = 11771765947716.

The previous prime is 11771765947699. The next prime is 11771765947723. The reversal of 11771765947717 is 71774956717711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7543844519236 + 4227921428481 = 2746606^2 + 2056191^2 .

It is a cyclic number.

It is not a de Polignac number, because 11771765947717 - 2¹⁵ = 11771765914949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11771765947517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5885882973858 + 5885882973859.

It is an arithmetic number, because the mean of its divisors is an integer number (5885882973859).

Almost surely, 2^{11771765947717} is an apocalyptic number.

It is an amenable number.

11771765947717 is a deficient number, since it is larger than the sum of its proper divisors (1).

11771765947717 is an equidigital number, since it uses as much as digits as its factorization.

11771765947717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127060920, while the sum is 70.

The spelling of 11771765947717 in words is "eleven trillion, seven hundred seventy-one billion, seven hundred sixty-five million, nine hundred forty-seven thousand, seven hundred seventeen".