26791799597 has 4 divisors (see below), whose sum is σ = 26987360316. Its totient is φ = 26596238880.

The previous prime is 26791799591. The next prime is 26791799599. The reversal of 26791799597 is 79599719762.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22062349156 + 4729450441 = 148534^2 + 68771^2 .

It is a cyclic number.

It is not a de Polignac number, because 26791799597 - 2⁸ = 26791799341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26791799597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26791799591) 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, 97780154 + ... + 97780427.

It is an arithmetic number, because the mean of its divisors is an integer number (6746840079).

Almost surely, 2^26791799597 is an apocalyptic number.

It is an amenable number.

26791799597 is a deficient number, since it is larger than the sum of its proper divisors (195560719).

26791799597 is a wasteful number, since it uses less digits than its factorization.

26791799597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195560718.

The product of its digits is 135025380, while the sum is 71.

The spelling of 26791799597 in words is "twenty-six billion, seven hundred ninety-one million, seven hundred ninety-nine thousand, five hundred ninety-seven".