844391922167 has 2 divisors, whose sum is σ = 844391922168. Its totient is φ = 844391922166.

The previous prime is 844391922151. The next prime is 844391922169. The reversal of 844391922167 is 761229193448.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 844391922167 - 2⁴ = 844391922151 is a prime.

Together with 844391922169, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (844391922169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422195961083 + 422195961084.

It is an arithmetic number, because the mean of its divisors is an integer number (422195961084).

Almost surely, 2^844391922167 is an apocalyptic number.

844391922167 is a deficient number, since it is larger than the sum of its proper divisors (1).

844391922167 is an equidigital number, since it uses as much as digits as its factorization.

844391922167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The spelling of 844391922167 in words is "eight hundred forty-four billion, three hundred ninety-one million, nine hundred twenty-two thousand, one hundred sixty-seven".