26280686424221 has 2 divisors, whose sum is σ = 26280686424222. Its totient is φ = 26280686424220.

The previous prime is 26280686424077. The next prime is 26280686424241. The reversal of 26280686424221 is 12242468608262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16248041944996 + 10032644479225 = 4030886^2 + 3167435^2 .

It is a cyclic number.

It is not a de Polignac number, because 26280686424221 - 2³⁸ = 26005808517277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26280686424241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13140343212110 + 13140343212111.

It is an arithmetic number, because the mean of its divisors is an integer number (13140343212111).

Almost surely, 2^{26280686424221} is an apocalyptic number.

It is an amenable number.

26280686424221 is a deficient number, since it is larger than the sum of its proper divisors (1).

26280686424221 is an equidigital number, since it uses as much as digits as its factorization.

26280686424221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7077888, while the sum is 53.

The spelling of 26280686424221 in words is "twenty-six trillion, two hundred eighty billion, six hundred eighty-six million, four hundred twenty-four thousand, two hundred twenty-one".