26891932811 has 2 divisors, whose sum is σ = 26891932812. Its totient is φ = 26891932810.

The previous prime is 26891932763. The next prime is 26891932813. The reversal of 26891932811 is 11823919862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26891932811 is a prime.

It is a super-2 number, since 2×26891932811² (a number of 22 digits) contains 22 as substring.

Together with 26891932813, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26891932811.

It is not a weakly prime, because it can be changed into another prime (26891932813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13445966405 + 13445966406.

It is an arithmetic number, because the mean of its divisors is an integer number (13445966406).

Almost surely, 2^26891932811 is an apocalyptic number.

26891932811 is a deficient number, since it is larger than the sum of its proper divisors (1).

26891932811 is an equidigital number, since it uses as much as digits as its factorization.

26891932811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 50.

The spelling of 26891932811 in words is "twenty-six billion, eight hundred ninety-one million, nine hundred thirty-two thousand, eight hundred eleven".