26208000391 has 4 divisors (see below), whose sum is σ = 26439929712. Its totient is φ = 25976071072.

The previous prime is 26208000389. The next prime is 26208000397. The reversal of 26208000391 is 19300080262.

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

It is a cyclic number.

It is not a de Polignac number, because 26208000391 - 2¹ = 26208000389 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 (26208000397) by changing a digit.

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, 115964491 + ... + 115964716.

It is an arithmetic number, because the mean of its divisors is an integer number (6609982428).

Almost surely, 2^26208000391 is an apocalyptic number.

26208000391 is the 102388-th centered pentagonal number.

26208000391 is a deficient number, since it is larger than the sum of its proper divisors (231929321).

26208000391 is a wasteful number, since it uses less digits than its factorization.

26208000391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231929320.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 26208000391 in words is "twenty-six billion, two hundred eight million, three hundred ninety-one", and thus it is an aban number.