26395566138891 has 12 divisors (see below), whose sum is σ = 38555321327640. Its totient is φ = 17399324495520.

The previous prime is 26395566138841. The next prime is 26395566138917. The reversal of 26395566138891 is 19883166559362.

26395566138891 is a `hidden beast` number, since 2 + 6 + 3 + 9 + 556 + 61 + 3 + 8 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 26395566138891 - 2⁹ = 26395566138379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26395566138841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16476632245 + ... + 16476633846.

It is an arithmetic number, because the mean of its divisors is an integer number (3212943443970).

Almost surely, 2^{26395566138891} is an apocalyptic number.

26395566138891 is a deficient number, since it is larger than the sum of its proper divisors (12159755188749).

26395566138891 is a wasteful number, since it uses less digits than its factorization.

26395566138891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32953266186 (or 32953266183 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 72.

The spelling of 26395566138891 in words is "twenty-six trillion, three hundred ninety-five billion, five hundred sixty-six million, one hundred thirty-eight thousand, eight hundred ninety-one".