26710805691 has 12 divisors (see below), whose sum is σ = 38618584368. Its totient is φ = 17790445584.

The previous prime is 26710805669. The next prime is 26710805699. The reversal of 26710805691 is 19650801762.

26710805691 is a `hidden beast` number, since 2 + 6 + 7 + 1 + 0 + 80 + 569 + 1 = 666.

It is not a de Polignac number, because 26710805691 - 2⁵ = 26710805659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26710805699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1386420 + ... + 1405553.

It is an arithmetic number, because the mean of its divisors is an integer number (3218215364).

Almost surely, 2^26710805691 is an apocalyptic number.

26710805691 is a deficient number, since it is larger than the sum of its proper divisors (11907778677).

26710805691 is a wasteful number, since it uses less digits than its factorization.

26710805691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793042 (or 2793039 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 26710805691 in words is "twenty-six billion, seven hundred ten million, eight hundred five thousand, six hundred ninety-one".