17798678447113 has 2 divisors, whose sum is σ = 17798678447114. Its totient is φ = 17798678447112.

The previous prime is 17798678447089. The next prime is 17798678447129. The reversal of 17798678447113 is 31174487689771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17798678447104 + 9 = 4218848^2 + 3^2 .

It is an emirp because it is prime and its reverse (31174487689771) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17798678447113 is a prime.

It is not a weakly prime, because it can be changed into another prime (17798678447153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8899339223556 + 8899339223557.

It is an arithmetic number, because the mean of its divisors is an integer number (8899339223557).

Almost surely, 2^{17798678447113} is an apocalyptic number.

It is an amenable number.

17798678447113 is a deficient number, since it is larger than the sum of its proper divisors (1).

17798678447113 is an equidigital number, since it uses as much as digits as its factorization.

17798678447113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 398297088, while the sum is 73.

The spelling of 17798678447113 in words is "seventeen trillion, seven hundred ninety-eight billion, six hundred seventy-eight million, four hundred forty-seven thousand, one hundred thirteen".