26005332809 has 2 divisors, whose sum is σ = 26005332810. Its totient is φ = 26005332808.

The previous prime is 26005332799. The next prime is 26005332811. The reversal of 26005332809 is 90823350062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21925317184 + 4080015625 = 148072^2 + 63875^2 .

It is a cyclic number.

It is not a de Polignac number, because 26005332809 - 2⁸ = 26005332553 is a prime.

Together with 26005332811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26005302809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13002666404 + 13002666405.

It is an arithmetic number, because the mean of its divisors is an integer number (13002666405).

Almost surely, 2^26005332809 is an apocalyptic number.

It is an amenable number.

26005332809 is a deficient number, since it is larger than the sum of its proper divisors (1).

26005332809 is an equidigital number, since it uses as much as digits as its factorization.

26005332809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 26005332809 in words is "twenty-six billion, five million, three hundred thirty-two thousand, eight hundred nine".