26809012211 has 2 divisors, whose sum is σ = 26809012212. Its totient is φ = 26809012210.

The previous prime is 26809012187. The next prime is 26809012229. The reversal of 26809012211 is 11221090862.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26809012211 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (26809012231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13404506105 + 13404506106.

It is an arithmetic number, because the mean of its divisors is an integer number (13404506106).

Almost surely, 2^26809012211 is an apocalyptic number.

26809012211 is a deficient number, since it is larger than the sum of its proper divisors (1).

26809012211 is an equidigital number, since it uses as much as digits as its factorization.

26809012211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The spelling of 26809012211 in words is "twenty-six billion, eight hundred nine million, twelve thousand, two hundred eleven".