26423566321 has 2 divisors, whose sum is σ = 26423566322. Its totient is φ = 26423566320.

The previous prime is 26423566319. The next prime is 26423566357. The reversal of 26423566321 is 12366532462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21686685696 + 4736880625 = 147264^2 + 68825^2 .

It is a cyclic number.

It is not a de Polignac number, because 26423566321 - 2¹ = 26423566319 is a prime.

Together with 26423566319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26423566381) 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, 13211783160 + 13211783161.

It is an arithmetic number, because the mean of its divisors is an integer number (13211783161).

Almost surely, 2^26423566321 is an apocalyptic number.

It is an amenable number.

26423566321 is a deficient number, since it is larger than the sum of its proper divisors (1).

26423566321 is an equidigital number, since it uses as much as digits as its factorization.

26423566321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 40.

The spelling of 26423566321 in words is "twenty-six billion, four hundred twenty-three million, five hundred sixty-six thousand, three hundred twenty-one".