26391253885 has 4 divisors (see below), whose sum is σ = 31669504668. Its totient is φ = 21113003104.

The previous prime is 26391253877. The next prime is 26391253891. The reversal of 26391253885 is 58835219362.

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 9418896601 + 16972357284 = 97051^2 + 130278^2 .

It is a cyclic number.

It is not a de Polignac number, because 26391253885 - 2³ = 26391253877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2639125384 + ... + 2639125393.

It is an arithmetic number, because the mean of its divisors is an integer number (7917376167).

Almost surely, 2^26391253885 is an apocalyptic number.

It is an amenable number.

26391253885 is a deficient number, since it is larger than the sum of its proper divisors (5278250783).

26391253885 is an equidigital number, since it uses as much as digits as its factorization.

26391253885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278250782.

The product of its digits is 3110400, while the sum is 52.

The spelling of 26391253885 in words is "twenty-six billion, three hundred ninety-one million, two hundred fifty-three thousand, eight hundred eighty-five".