26642643393833 has 2 divisors, whose sum is σ = 26642643393834. Its totient is φ = 26642643393832.

The previous prime is 26642643393703. The next prime is 26642643393893. The reversal of 26642643393833 is 33839334624662.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22788049384489 + 3854594009344 = 4773683^2 + 1963312^2 .

It is a cyclic number.

It is not a de Polignac number, because 26642643393833 - 2⁸ = 26642643393577 is a prime.

It is not a weakly prime, because it can be changed into another prime (26642643393893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13321321696916 + 13321321696917.

It is an arithmetic number, because the mean of its divisors is an integer number (13321321696917).

Almost surely, 2^{26642643393833} is an apocalyptic number.

It is an amenable number.

26642643393833 is a deficient number, since it is larger than the sum of its proper divisors (1).

26642643393833 is an equidigital number, since it uses as much as digits as its factorization.

26642643393833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241864704, while the sum is 62.

The spelling of 26642643393833 in words is "twenty-six trillion, six hundred forty-two billion, six hundred forty-three million, three hundred ninety-three thousand, eight hundred thirty-three".