8145444173 has 2 divisors, whose sum is σ = 8145444174. Its totient is φ = 8145444172.

The previous prime is 8145444169. The next prime is 8145444179. The reversal of 8145444173 is 3714445418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7592159689 + 553284484 = 87133^2 + 23522^2 .

It is a cyclic number.

It is not a de Polignac number, because 8145444173 - 2² = 8145444169 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 8145444173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8145444179) 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, 4072722086 + 4072722087.

It is an arithmetic number, because the mean of its divisors is an integer number (4072722087).

Almost surely, 2^8145444173 is an apocalyptic number.

It is an amenable number.

8145444173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8145444173 is an equidigital number, since it uses as much as digits as its factorization.

8145444173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 41.

The square root of 8145444173 is about 90252.1145070851. The cubic root of 8145444173 is about 2012.0476293421.

The spelling of 8145444173 in words is "eight billion, one hundred forty-five million, four hundred forty-four thousand, one hundred seventy-three".