9717599880917 has 2 divisors, whose sum is σ = 9717599880918. Its totient is φ = 9717599880916.

The previous prime is 9717599880913. The next prime is 9717599880959. The reversal of 9717599880917 is 7190889957179.

9717599880917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6843215330116 + 2874384550801 = 2615954^2 + 1695401^2 .

It is a cyclic number.

It is not a de Polignac number, because 9717599880917 - 2² = 9717599880913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9717599880913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4858799940458 + 4858799940459.

It is an arithmetic number, because the mean of its divisors is an integer number (4858799940459).

Almost surely, 2^{9717599880917} is an apocalyptic number.

It is an amenable number.

9717599880917 is a deficient number, since it is larger than the sum of its proper divisors (1).

9717599880917 is an equidigital number, since it uses as much as digits as its factorization.

9717599880917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720135360, while the sum is 80.

The spelling of 9717599880917 in words is "nine trillion, seven hundred seventeen billion, five hundred ninety-nine million, eight hundred eighty thousand, nine hundred seventeen".