26569339109 has 2 divisors, whose sum is σ = 26569339110. Its totient is φ = 26569339108.

The previous prime is 26569339091. The next prime is 26569339123. The reversal of 26569339109 is 90193396562.

Together with previous prime (26569339091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24062834884 + 2506504225 = 155122^2 + 50065^2 .

It is a cyclic number.

It is not a de Polignac number, because 26569339109 - 2²⁰ = 26568290533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26569339129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13284669554 + 13284669555.

It is an arithmetic number, because the mean of its divisors is an integer number (13284669555).

Almost surely, 2^26569339109 is an apocalyptic number.

It is an amenable number.

26569339109 is a deficient number, since it is larger than the sum of its proper divisors (1).

26569339109 is an equidigital number, since it uses as much as digits as its factorization.

26569339109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The spelling of 26569339109 in words is "twenty-six billion, five hundred sixty-nine million, three hundred thirty-nine thousand, one hundred nine".