26916668516917 has 2 divisors, whose sum is σ = 26916668516918. Its totient is φ = 26916668516916.

The previous prime is 26916668516827. The next prime is 26916668516923. The reversal of 26916668516917 is 71961586661962.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19045944875556 + 7870723641361 = 4364166^2 + 2805481^2 .

It is a cyclic number.

It is not a de Polignac number, because 26916668516917 - 2⁷ = 26916668516789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26916668516917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26916668516317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13458334258458 + 13458334258459.

It is an arithmetic number, because the mean of its divisors is an integer number (13458334258459).

Almost surely, 2^{26916668516917} is an apocalyptic number.

It is an amenable number.

26916668516917 is a deficient number, since it is larger than the sum of its proper divisors (1).

26916668516917 is an equidigital number, since it uses as much as digits as its factorization.

26916668516917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352719360, while the sum is 73.

The spelling of 26916668516917 in words is "twenty-six trillion, nine hundred sixteen billion, six hundred sixty-eight million, five hundred sixteen thousand, nine hundred seventeen".