26517702791 has 2 divisors, whose sum is σ = 26517702792. Its totient is φ = 26517702790.

The previous prime is 26517702719. The next prime is 26517702797. The reversal of 26517702791 is 19720771562.

Together with previous prime (26517702719) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26517702791 - 2¹⁴ = 26517686407 is a prime.

It is a super-2 number, since 2×26517702791² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26517702797) 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, 13258851395 + 13258851396.

It is an arithmetic number, because the mean of its divisors is an integer number (13258851396).

Almost surely, 2^26517702791 is an apocalyptic number.

26517702791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26517702791 is an equidigital number, since it uses as much as digits as its factorization.

26517702791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 47.

The spelling of 26517702791 in words is "twenty-six billion, five hundred seventeen million, seven hundred two thousand, seven hundred ninety-one".