26609044109 has 2 divisors, whose sum is σ = 26609044110. Its totient is φ = 26609044108.

The previous prime is 26609044051. The next prime is 26609044123. The reversal of 26609044109 is 90144090662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22088498884 + 4520545225 = 148622^2 + 67235^2 .

It is a cyclic number.

It is not a de Polignac number, because 26609044109 - 2¹² = 26609040013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26609044159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13304522054 + 13304522055.

It is an arithmetic number, because the mean of its divisors is an integer number (13304522055).

Almost surely, 2^26609044109 is an apocalyptic number.

It is an amenable number.

26609044109 is a deficient number, since it is larger than the sum of its proper divisors (1).

26609044109 is an equidigital number, since it uses as much as digits as its factorization.

26609044109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 26609044109 in words is "twenty-six billion, six hundred nine million, forty-four thousand, one hundred nine".