26991843839999 has 8 divisors (see below), whose sum is σ = 26996819029392. Its totient is φ = 26986868979840.

The previous prime is 26991843839971. The next prime is 26991843840007. The reversal of 26991843839999 is 99993834819962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26991843839999 - 2⁸ = 26991843839743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26991843839959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212198192 + ... + 212325354.

It is an arithmetic number, because the mean of its divisors is an integer number (3374602378674).

Almost surely, 2^{26991843839999} is an apocalyptic number.

26991843839999 is a deficient number, since it is larger than the sum of its proper divisors (4975189393).

26991843839999 is a wasteful number, since it uses less digits than its factorization.

26991843839999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164617.

The product of its digits is 14693280768, while the sum is 89.

The spelling of 26991843839999 in words is "twenty-six trillion, nine hundred ninety-one billion, eight hundred forty-three million, eight hundred thirty-nine thousand, nine hundred ninety-nine".