26138000209 has 4 divisors (see below), whose sum is σ = 26242135920. Its totient is φ = 26033864500.

The previous prime is 26138000183. The next prime is 26138000261. The reversal of 26138000209 is 90200083162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26138000209 - 2⁵ = 26138000177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26138000309) 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, 52067479 + ... + 52067980.

It is an arithmetic number, because the mean of its divisors is an integer number (6560533980).

Almost surely, 2^26138000209 is an apocalyptic number.

It is an amenable number.

26138000209 is a deficient number, since it is larger than the sum of its proper divisors (104135711).

26138000209 is a wasteful number, since it uses less digits than its factorization.

26138000209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104135710.

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

The spelling of 26138000209 in words is "twenty-six billion, one hundred thirty-eight million, two hundred nine", and thus it is an aban number.