78846680260709 has 2 divisors, whose sum is σ = 78846680260710. Its totient is φ = 78846680260708.

The previous prime is 78846680260651. The next prime is 78846680260807. The reversal of 78846680260709 is 90706208664887.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66130481164225 + 12716199096484 = 8132065^2 + 3565978^2 .

It is an emirp because it is prime and its reverse (90706208664887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78846680260709 - 2²⁴ = 78846663483493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78846680266709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39423340130354 + 39423340130355.

It is an arithmetic number, because the mean of its divisors is an integer number (39423340130355).

Almost surely, 2^{78846680260709} is an apocalyptic number.

It is an amenable number.

78846680260709 is a deficient number, since it is larger than the sum of its proper divisors (1).

78846680260709 is an equidigital number, since it uses as much as digits as its factorization.

78846680260709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 390168576, while the sum is 71.

The spelling of 78846680260709 in words is "seventy-eight trillion, eight hundred forty-six billion, six hundred eighty million, two hundred sixty thousand, seven hundred nine".