26812186318717 has 4 divisors (see below), whose sum is σ = 26812333685536. Its totient is φ = 26812038951900.

The previous prime is 26812186318669. The next prime is 26812186318733. The reversal of 26812186318717 is 71781368121862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26812186318717 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 (26812186318777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73410159 + ... + 73774492.

It is an arithmetic number, because the mean of its divisors is an integer number (6703083421384).

Almost surely, 2^{26812186318717} is an apocalyptic number.

It is an amenable number.

26812186318717 is a deficient number, since it is larger than the sum of its proper divisors (147366819).

26812186318717 is a wasteful number, since it uses less digits than its factorization.

26812186318717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147366818.

The product of its digits is 10838016, while the sum is 61.

The spelling of 26812186318717 in words is "twenty-six trillion, eight hundred twelve billion, one hundred eighty-six million, three hundred eighteen thousand, seven hundred seventeen".