26463521521 has 2 divisors, whose sum is σ = 26463521522. Its totient is φ = 26463521520.

The previous prime is 26463521453. The next prime is 26463521561. The reversal of 26463521521 is 12512536462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16595880625 + 9867640896 = 128825^2 + 99336^2 .

It is a cyclic number.

It is not a de Polignac number, because 26463521521 - 2¹¹ = 26463519473 is a prime.

It is not a weakly prime, because it can be changed into another prime (26463521561) 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, 13231760760 + 13231760761.

It is an arithmetic number, because the mean of its divisors is an integer number (13231760761).

Almost surely, 2^26463521521 is an apocalyptic number.

It is an amenable number.

26463521521 is a deficient number, since it is larger than the sum of its proper divisors (1).

26463521521 is an equidigital number, since it uses as much as digits as its factorization.

26463521521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The spelling of 26463521521 in words is "twenty-six billion, four hundred sixty-three million, five hundred twenty-one thousand, five hundred twenty-one".