26899808139 has 24 divisors (see below), whose sum is σ = 40203203040. Its totient is φ = 17311335552.

The previous prime is 26899808123. The next prime is 26899808147. The reversal of 26899808139 is 93180899862.

It is not a de Polignac number, because 26899808139 - 2⁴ = 26899808123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26899808149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2150407 + ... + 2162879.

It is an arithmetic number, because the mean of its divisors is an integer number (1675133460).

Almost surely, 2^26899808139 is an apocalyptic number.

26899808139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26899808139 is a deficient number, since it is larger than the sum of its proper divisors (13303394901).

26899808139 is a wasteful number, since it uses less digits than its factorization.

26899808139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20771 (or 20768 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 63.

The spelling of 26899808139 in words is "twenty-six billion, eight hundred ninety-nine million, eight hundred eight thousand, one hundred thirty-nine".