26591886789 has 16 divisors (see below), whose sum is σ = 38903663232. Its totient is φ = 16055477568.

The previous prime is 26591886779. The next prime is 26591886851. The reversal of 26591886789 is 98768819562.

It is not a de Polignac number, because 26591886789 - 2⁴ = 26591886773 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26591886779) 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 in 15 ways as a sum of consecutive naturals, for example, 6430417 + ... + 6434550.

It is an arithmetic number, because the mean of its divisors is an integer number (2431478952).

Almost surely, 2^26591886789 is an apocalyptic number.

It is an amenable number.

26591886789 is a deficient number, since it is larger than the sum of its proper divisors (12311776443).

26591886789 is a wasteful number, since it uses less digits than its factorization.

26591886789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12865036.

The product of its digits is 104509440, while the sum is 69.

The spelling of 26591886789 in words is "twenty-six billion, five hundred ninety-one million, eight hundred eighty-six thousand, seven hundred eighty-nine".