17718221084659 has 2 divisors, whose sum is σ = 17718221084660. Its totient is φ = 17718221084658.

The previous prime is 17718221084657. The next prime is 17718221084689. The reversal of 17718221084659 is 95648012281771.

It is a weak prime.

It is an emirp because it is prime and its reverse (95648012281771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17718221084659 - 2¹ = 17718221084657 is a prime.

Together with 17718221084657, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 17718221084597 and 17718221084606.

It is not a weakly prime, because it can be changed into another prime (17718221084657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8859110542329 + 8859110542330.

It is an arithmetic number, because the mean of its divisors is an integer number (8859110542330).

Almost surely, 2^{17718221084659} is an apocalyptic number.

17718221084659 is a deficient number, since it is larger than the sum of its proper divisors (1).

17718221084659 is an equidigital number, since it uses as much as digits as its factorization.

17718221084659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 17718221084659 in words is "seventeen trillion, seven hundred eighteen billion, two hundred twenty-one million, eighty-four thousand, six hundred fifty-nine".