26030389661 has 2 divisors, whose sum is σ = 26030389662. Its totient is φ = 26030389660.

The previous prime is 26030389643. The next prime is 26030389667. The reversal of 26030389661 is 16698303062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25706029561 + 324360100 = 160331^2 + 18010^2 .

It is a cyclic number.

It is not a de Polignac number, because 26030389661 - 2³⁴ = 8850520477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26030389667) 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, 13015194830 + 13015194831.

It is an arithmetic number, because the mean of its divisors is an integer number (13015194831).

Almost surely, 2^26030389661 is an apocalyptic number.

It is an amenable number.

26030389661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26030389661 is an equidigital number, since it uses as much as digits as its factorization.

26030389661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 26030389661 in words is "twenty-six billion, thirty million, three hundred eighty-nine thousand, six hundred sixty-one".