128598796517 has 2 divisors, whose sum is σ = 128598796518. Its totient is φ = 128598796516.

The previous prime is 128598796507. The next prime is 128598796519. The reversal of 128598796517 is 715697895821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89024060161 + 39574736356 = 298369^2 + 198934^2 .

It is an emirp because it is prime and its reverse (715697895821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128598796517 is a prime.

Together with 128598796519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128598796519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64299398258 + 64299398259.

It is an arithmetic number, because the mean of its divisors is an integer number (64299398259).

Almost surely, 2^128598796517 is an apocalyptic number.

It is an amenable number.

128598796517 is a deficient number, since it is larger than the sum of its proper divisors (1).

128598796517 is an equidigital number, since it uses as much as digits as its factorization.

128598796517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76204800, while the sum is 68.

The spelling of 128598796517 in words is "one hundred twenty-eight billion, five hundred ninety-eight million, seven hundred ninety-six thousand, five hundred seventeen".