26443843973 has 2 divisors, whose sum is σ = 26443843974. Its totient is φ = 26443843972.

The previous prime is 26443843969. The next prime is 26443844017. The reversal of 26443843973 is 37934834462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25102599844 + 1341244129 = 158438^2 + 36623^2 .

It is a cyclic number.

It is not a de Polignac number, because 26443843973 - 2² = 26443843969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26443803973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13221921986 + 13221921987.

It is an arithmetic number, because the mean of its divisors is an integer number (13221921987).

Almost surely, 2^26443843973 is an apocalyptic number.

It is an amenable number.

26443843973 is a deficient number, since it is larger than the sum of its proper divisors (1).

26443843973 is an equidigital number, since it uses as much as digits as its factorization.

26443843973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 53.

The spelling of 26443843973 in words is "twenty-six billion, four hundred forty-three million, eight hundred forty-three thousand, nine hundred seventy-three".