26811555611 has 2 divisors, whose sum is σ = 26811555612. Its totient is φ = 26811555610.

The previous prime is 26811555601. The next prime is 26811555613. The reversal of 26811555611 is 11655511862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26811555611 is a prime.

Together with 26811555613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26811555613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13405777805 + 13405777806.

It is an arithmetic number, because the mean of its divisors is an integer number (13405777806).

Almost surely, 2^26811555611 is an apocalyptic number.

26811555611 is a deficient number, since it is larger than the sum of its proper divisors (1).

26811555611 is an equidigital number, since it uses as much as digits as its factorization.

26811555611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 41.

The spelling of 26811555611 in words is "twenty-six billion, eight hundred eleven million, five hundred fifty-five thousand, six hundred eleven".