26248666261 has 2 divisors, whose sum is σ = 26248666262. Its totient is φ = 26248666260.

The previous prime is 26248666259. The next prime is 26248666271. The reversal of 26248666261 is 16266684262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26091940900 + 156725361 = 161530^2 + 12519^2 .

It is a cyclic number.

It is not a de Polignac number, because 26248666261 - 2¹ = 26248666259 is a prime.

Together with 26248666259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26248666271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13124333130 + 13124333131.

It is an arithmetic number, because the mean of its divisors is an integer number (13124333131).

Almost surely, 2^26248666261 is an apocalyptic number.

It is an amenable number.

26248666261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26248666261 is an equidigital number, since it uses as much as digits as its factorization.

26248666261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 49.

The spelling of 26248666261 in words is "twenty-six billion, two hundred forty-eight million, six hundred sixty-six thousand, two hundred sixty-one".