26219835209 has 2 divisors, whose sum is σ = 26219835210. Its totient is φ = 26219835208.

The previous prime is 26219835203. The next prime is 26219835253. The reversal of 26219835209 is 90253891262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18843601984 + 7376233225 = 137272^2 + 85885^2 .

It is a cyclic number.

It is not a de Polignac number, because 26219835209 - 2¹⁶ = 26219769673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26219835203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13109917604 + 13109917605.

It is an arithmetic number, because the mean of its divisors is an integer number (13109917605).

Almost surely, 2^26219835209 is an apocalyptic number.

It is an amenable number.

26219835209 is a deficient number, since it is larger than the sum of its proper divisors (1).

26219835209 is an equidigital number, since it uses as much as digits as its factorization.

26219835209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 26219835209 in words is "twenty-six billion, two hundred nineteen million, eight hundred thirty-five thousand, two hundred nine".