26744226661 has 2 divisors, whose sum is σ = 26744226662. Its totient is φ = 26744226660.

The previous prime is 26744226647. The next prime is 26744226671. The reversal of 26744226661 is 16662244762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14833778436 + 11910448225 = 121794^2 + 109135^2 .

It is a cyclic number.

It is not a de Polignac number, because 26744226661 - 2⁵ = 26744226629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26744226611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13372113330 + 13372113331.

It is an arithmetic number, because the mean of its divisors is an integer number (13372113331).

Almost surely, 2^26744226661 is an apocalyptic number.

It is an amenable number.

26744226661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26744226661 is an equidigital number, since it uses as much as digits as its factorization.

26744226661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 46.

The spelling of 26744226661 in words is "twenty-six billion, seven hundred forty-four million, two hundred twenty-six thousand, six hundred sixty-one".