26834043689 has 2 divisors, whose sum is σ = 26834043690. Its totient is φ = 26834043688.

The previous prime is 26834043671. The next prime is 26834043727. The reversal of 26834043689 is 98634043862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16126968064 + 10707075625 = 126992^2 + 103475^2 .

It is a cyclic number.

It is not a de Polignac number, because 26834043689 - 2³² = 22539076393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26834043689.

It is not a weakly prime, because it can be changed into another prime (26834043659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13417021844 + 13417021845.

It is an arithmetic number, because the mean of its divisors is an integer number (13417021845).

Almost surely, 2^26834043689 is an apocalyptic number.

It is an amenable number.

26834043689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26834043689 is an equidigital number, since it uses as much as digits as its factorization.

26834043689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 53.

The spelling of 26834043689 in words is "twenty-six billion, eight hundred thirty-four million, forty-three thousand, six hundred eighty-nine".