26812097281 has 4 divisors (see below), whose sum is σ = 28389279492. Its totient is φ = 25234915072.

The previous prime is 26812097269. The next prime is 26812097297. The reversal of 26812097281 is 18279021862.

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 19429850881 + 7382246400 = 139391^2 + 85920^2 .

It is a cyclic number.

It is not a de Polignac number, because 26812097281 - 2²⁵ = 26778542849 is a prime.

It is a super-2 number, since 2×26812097281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26812097201) 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, 788591080 + ... + 788591113.

It is an arithmetic number, because the mean of its divisors is an integer number (7097319873).

Almost surely, 2^26812097281 is an apocalyptic number.

It is an amenable number.

26812097281 is a deficient number, since it is larger than the sum of its proper divisors (1577182211).

26812097281 is a wasteful number, since it uses less digits than its factorization.

26812097281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577182210.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 26812097281 in words is "twenty-six billion, eight hundred twelve million, ninety-seven thousand, two hundred eighty-one".