26639906838 has 8 divisors (see below), whose sum is σ = 53279813688. Its totient is φ = 8879968944.

The previous prime is 26639906827. The next prime is 26639906857. The reversal of 26639906838 is 83860993662.

It is a sphenic number, since it is the product of 3 distinct primes.

26639906838 is an admirable number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2219992231 + ... + 2219992242.

It is an arithmetic number, because the mean of its divisors is an integer number (6659976711).

Almost surely, 2^26639906838 is an apocalyptic number.

26639906838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26639906838 is a wasteful number, since it uses less digits than its factorization.

26639906838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439984478.

The product of its (nonzero) digits is 20155392, while the sum is 60.

The spelling of 26639906838 in words is "twenty-six billion, six hundred thirty-nine million, nine hundred six thousand, eight hundred thirty-eight".