26556323489 has 2 divisors, whose sum is σ = 26556323490. Its totient is φ = 26556323488.

The previous prime is 26556323459. The next prime is 26556323551. The reversal of 26556323489 is 98432365562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21766576225 + 4789747264 = 147535^2 + 69208^2 .

It is a cyclic number.

It is not a de Polignac number, because 26556323489 - 2¹² = 26556319393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26556323489.

It is not a weakly prime, because it can be changed into another prime (26556323419) 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, 13278161744 + 13278161745.

It is an arithmetic number, because the mean of its divisors is an integer number (13278161745).

Almost surely, 2^26556323489 is an apocalyptic number.

It is an amenable number.

26556323489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26556323489 is an equidigital number, since it uses as much as digits as its factorization.

26556323489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 53.

The spelling of 26556323489 in words is "twenty-six billion, five hundred fifty-six million, three hundred twenty-three thousand, four hundred eighty-nine".