26248517891 has 2 divisors, whose sum is σ = 26248517892. Its totient is φ = 26248517890.

The previous prime is 26248517887. The next prime is 26248517909. The reversal of 26248517891 is 19871584262.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26248517891 - 2² = 26248517887 is a prime.

It is a super-3 number, since 3×26248517891³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (26248517881) 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, 13124258945 + 13124258946.

It is an arithmetic number, because the mean of its divisors is an integer number (13124258946).

Almost surely, 2^26248517891 is an apocalyptic number.

26248517891 is a deficient number, since it is larger than the sum of its proper divisors (1).

26248517891 is an equidigital number, since it uses as much as digits as its factorization.

26248517891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 53.

The spelling of 26248517891 in words is "twenty-six billion, two hundred forty-eight million, five hundred seventeen thousand, eight hundred ninety-one".