27800766089 has 2 divisors, whose sum is σ = 27800766090. Its totient is φ = 27800766088.

The previous prime is 27800766053. The next prime is 27800766223. The reversal of 27800766089 is 98066700872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25269871225 + 2530894864 = 158965^2 + 50308^2 .

It is a cyclic number.

It is not a de Polignac number, because 27800766089 - 2⁸ = 27800765833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27800766089.

It is not a weakly prime, because it can be changed into another prime (27800766289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900383044 + 13900383045.

It is an arithmetic number, because the mean of its divisors is an integer number (13900383045).

Almost surely, 2^27800766089 is an apocalyptic number.

It is an amenable number.

27800766089 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800766089 is an equidigital number, since it uses as much as digits as its factorization.

27800766089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 27800766089 in words is "twenty-seven billion, eight hundred million, seven hundred sixty-six thousand, eighty-nine".