26230788721 has 2 divisors, whose sum is σ = 26230788722. Its totient is φ = 26230788720.

The previous prime is 26230788719. The next prime is 26230788733. The reversal of 26230788721 is 12788703262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20774898225 + 5455890496 = 144135^2 + 73864^2 .

It is a cyclic number.

It is not a de Polignac number, because 26230788721 - 2¹ = 26230788719 is a prime.

Together with 26230788719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26230788761) 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, 13115394360 + 13115394361.

It is an arithmetic number, because the mean of its divisors is an integer number (13115394361).

Almost surely, 2^26230788721 is an apocalyptic number.

It is an amenable number.

26230788721 is a deficient number, since it is larger than the sum of its proper divisors (1).

26230788721 is an equidigital number, since it uses as much as digits as its factorization.

26230788721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 26230788721 in words is "twenty-six billion, two hundred thirty million, seven hundred eighty-eight thousand, seven hundred twenty-one".