26891111138 has 8 divisors (see below), whose sum is σ = 41637849600. Its totient is φ = 13011827940.

The previous prime is 26891111131. The next prime is 26891111167. The reversal of 26891111138 is 83111119862.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 26891111095 and 26891111104.

It is not an unprimeable number, because it can be changed into a prime (26891111131) 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, 216863738 + ... + 216863861.

It is an arithmetic number, because the mean of its divisors is an integer number (5204731200).

Almost surely, 2^26891111138 is an apocalyptic number.

26891111138 is a deficient number, since it is larger than the sum of its proper divisors (14746738462).

26891111138 is a wasteful number, since it uses less digits than its factorization.

26891111138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433727632.

The product of its digits is 20736, while the sum is 41.

The spelling of 26891111138 in words is "twenty-six billion, eight hundred ninety-one million, one hundred eleven thousand, one hundred thirty-eight".