26889000109 has 2 divisors, whose sum is σ = 26889000110. Its totient is φ = 26889000108.

The previous prime is 26889000097. The next prime is 26889000143. The reversal of 26889000109 is 90100098862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15148194084 + 11740806025 = 123078^2 + 108355^2 .

It is a cyclic number.

It is not a de Polignac number, because 26889000109 - 2⁷ = 26888999981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26889000409) 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 as a sum of consecutive naturals, namely, 13444500054 + 13444500055.

It is an arithmetic number, because the mean of its divisors is an integer number (13444500055).

Almost surely, 2^26889000109 is an apocalyptic number.

It is an amenable number.

26889000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

26889000109 is an equidigital number, since it uses as much as digits as its factorization.

26889000109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 26889000109 in words is "twenty-six billion, eight hundred eighty-nine million, one hundred nine", and thus it is an aban number.