26396135597 has 4 divisors (see below), whose sum is σ = 28426607580. Its totient is φ = 24365663616.

The previous prime is 26396135561. The next prime is 26396135599. The reversal of 26396135597 is 79553169362.

It is a happy number.

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 1187905156 + 25208230441 = 34466^2 + 158771^2 .

It is a cyclic number.

It is not a de Polignac number, because 26396135597 - 2²⁰ = 26395087021 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 (26396135599) 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, 1015235972 + ... + 1015235997.

It is an arithmetic number, because the mean of its divisors is an integer number (7106651895).

Almost surely, 2^26396135597 is an apocalyptic number.

It is an amenable number.

26396135597 is a deficient number, since it is larger than the sum of its proper divisors (2030471983).

26396135597 is a wasteful number, since it uses less digits than its factorization.

26396135597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030471982.

The product of its digits is 9185400, while the sum is 56.

The spelling of 26396135597 in words is "twenty-six billion, three hundred ninety-six million, one hundred thirty-five thousand, five hundred ninety-seven".