26513520516281 has 2 divisors, whose sum is σ = 26513520516282. Its totient is φ = 26513520516280.

The previous prime is 26513520516277. The next prime is 26513520516319. The reversal of 26513520516281 is 18261502531562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14164684960000 + 12348835556281 = 3763600^2 + 3514091^2 .

It is a cyclic number.

It is not a de Polignac number, because 26513520516281 - 2² = 26513520516277 is a prime.

It is a super-2 number, since 2×26513520516281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26513529516281) 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, 13256760258140 + 13256760258141.

It is an arithmetic number, because the mean of its divisors is an integer number (13256760258141).

Almost surely, 2^{26513520516281} is an apocalyptic number.

It is an amenable number.

26513520516281 is a deficient number, since it is larger than the sum of its proper divisors (1).

26513520516281 is an equidigital number, since it uses as much as digits as its factorization.

26513520516281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 26513520516281 in words is "twenty-six trillion, five hundred thirteen billion, five hundred twenty million, five hundred sixteen thousand, two hundred eighty-one".