80851042189 has 2 divisors, whose sum is σ = 80851042190. Its totient is φ = 80851042188.

The previous prime is 80851042177. The next prime is 80851042273. The reversal of 80851042189 is 98124015808.

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., 78661738089 + 2189304100 = 280467^2 + 46790^2 .

It is a cyclic number.

It is not a de Polignac number, because 80851042189 - 2⁵ = 80851042157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80851042289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40425521094 + 40425521095.

It is an arithmetic number, because the mean of its divisors is an integer number (40425521095).

Almost surely, 2^80851042189 is an apocalyptic number.

It is an amenable number.

80851042189 is a deficient number, since it is larger than the sum of its proper divisors (1).

80851042189 is an equidigital number, since it uses as much as digits as its factorization.

80851042189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 46.

The spelling of 80851042189 in words is "eighty billion, eight hundred fifty-one million, forty-two thousand, one hundred eighty-nine".