26891111139 has 16 divisors (see below), whose sum is σ = 37970272800. Its totient is φ = 16870031360.

The previous prime is 26891111131. The next prime is 26891111167. The reversal of 26891111139 is 93111119862.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26891111139 - 2³ = 26891111131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26891111139.

It is not an unprimeable number, because it can be changed into a prime (26891111131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288019 + ... + 369779.

It is an arithmetic number, because the mean of its divisors is an integer number (2373142050).

Almost surely, 2^26891111139 is an apocalyptic number.

26891111139 is a deficient number, since it is larger than the sum of its proper divisors (11079161661).

26891111139 is a wasteful number, since it uses less digits than its factorization.

26891111139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88230.

The product of its digits is 23328, while the sum is 42.

The spelling of 26891111139 in words is "twenty-six billion, eight hundred ninety-one million, one hundred eleven thousand, one hundred thirty-nine".