26561231255 has 16 divisors (see below), whose sum is σ = 35252997024. Its totient is φ = 19084325760.

The previous prime is 26561231251. The next prime is 26561231261. The reversal of 26561231255 is 55213216562.

It is not a de Polignac number, because 26561231255 - 2² = 26561231251 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26561231251) 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 in 15 ways as a sum of consecutive naturals, for example, 5519681 + ... + 5524490.

It is an arithmetic number, because the mean of its divisors is an integer number (2203312314).

Almost surely, 2^26561231255 is an apocalyptic number.

26561231255 is a deficient number, since it is larger than the sum of its proper divisors (8691765769).

26561231255 is a wasteful number, since it uses less digits than its factorization.

26561231255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044226.

The product of its digits is 108000, while the sum is 38.

The spelling of 26561231255 in words is "twenty-six billion, five hundred sixty-one million, two hundred thirty-one thousand, two hundred fifty-five".