65220120511717 has 2 divisors, whose sum is σ = 65220120511718. Its totient is φ = 65220120511716.

The previous prime is 65220120511697. The next prime is 65220120511783. The reversal of 65220120511717 is 71711502102256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56453493710916 + 8766626800801 = 7513554^2 + 2960849^2 .

It is a cyclic number.

It is not a de Polignac number, because 65220120511717 - 2⁷ = 65220120511589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65220120511717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65220120512717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32610060255858 + 32610060255859.

It is an arithmetic number, because the mean of its divisors is an integer number (32610060255859).

Almost surely, 2^{65220120511717} is an apocalyptic number.

It is an amenable number.

65220120511717 is a deficient number, since it is larger than the sum of its proper divisors (1).

65220120511717 is an equidigital number, since it uses as much as digits as its factorization.

65220120511717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 65220120511717 in words is "sixty-five trillion, two hundred twenty billion, one hundred twenty million, five hundred eleven thousand, seven hundred seventeen".