26831086065861 has 48 divisors (see below), whose sum is σ = 47305496179200. Its totient is φ = 13204635634080.

The previous prime is 26831086065821. The next prime is 26831086065887. The reversal of 26831086065861 is 16856068013862.

It is a happy number.

It is not a de Polignac number, because 26831086065861 - 2⁷ = 26831086065733 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26831086065795 and 26831086065804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26831086065821) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277827051 + ... + 277923608.

It is an arithmetic number, because the mean of its divisors is an integer number (985531170400).

Almost surely, 2^{26831086065861} is an apocalyptic number.

26831086065861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

26831086065861 is a deficient number, since it is larger than the sum of its proper divisors (20474410113339).

26831086065861 is a wasteful number, since it uses less digits than its factorization.

26831086065861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555750710 (or 555750699 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 26831086065861 in words is "twenty-six trillion, eight hundred thirty-one billion, eighty-six million, sixty-five thousand, eight hundred sixty-one".