26708172319991 has 2 divisors, whose sum is σ = 26708172319992. Its totient is φ = 26708172319990.

The previous prime is 26708172319987. The next prime is 26708172320033. The reversal of 26708172319991 is 19991327180762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26708172319991 - 2² = 26708172319987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26708172319291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13354086159995 + 13354086159996.

It is an arithmetic number, because the mean of its divisors is an integer number (13354086159996).

Almost surely, 2^{26708172319991} is an apocalyptic number.

26708172319991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26708172319991 is an equidigital number, since it uses as much as digits as its factorization.

26708172319991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20575296, while the sum is 65.

The spelling of 26708172319991 in words is "twenty-six trillion, seven hundred eight billion, one hundred seventy-two million, three hundred nineteen thousand, nine hundred ninety-one".