26211979117 has 4 divisors (see below), whose sum is σ = 26378934556. Its totient is φ = 26045023680.

The previous prime is 26211979097. The next prime is 26211979217. The reversal of 26211979117 is 71197911262.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71197911262 = 2 ⋅35598955631.

It can be written as a sum of positive squares in 2 ways, for example, as 4654104841 + 21557874276 = 68221^2 + 146826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26211979117 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 (26211979217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83477484 + ... + 83477797.

It is an arithmetic number, because the mean of its divisors is an integer number (6594733639).

Almost surely, 2^26211979117 is an apocalyptic number.

It is an amenable number.

26211979117 is a deficient number, since it is larger than the sum of its proper divisors (166955439).

26211979117 is a wasteful number, since it uses less digits than its factorization.

26211979117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166955438.

The product of its digits is 95256, while the sum is 46.

The spelling of 26211979117 in words is "twenty-six billion, two hundred eleven million, nine hundred seventy-nine thousand, one hundred seventeen".