26899808138 has 32 divisors (see below), whose sum is σ = 46279655424. Its totient is φ = 11487128112.

The previous prime is 26899808123. The next prime is 26899808147. The reversal of 26899808138 is 83180899862.

It is a super-2 number, since 2×26899808138² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7757081 + ... + 7760547.

It is an arithmetic number, because the mean of its divisors is an integer number (1446239232).

Almost surely, 2^26899808138 is an apocalyptic number.

26899808138 is a deficient number, since it is larger than the sum of its proper divisors (19379847286).

26899808138 is a wasteful number, since it uses less digits than its factorization.

26899808138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The spelling of 26899808138 in words is "twenty-six billion, eight hundred ninety-nine million, eight hundred eight thousand, one hundred thirty-eight".