4518447145 has 4 divisors (see below), whose sum is σ = 5422136580. Its totient is φ = 3614757712.

The previous prime is 4518447139. The next prime is 4518447149. The reversal of 4518447145 is 5417448154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 592046224 + 3926400921 = 24332^2 + 62661^2 .

It is a cyclic number.

It is not a de Polignac number, because 4518447145 - 2³ = 4518447137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4518447149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451844710 + ... + 451844719.

It is an arithmetic number, because the mean of its divisors is an integer number (1355534145).

Almost surely, 2^4518447145 is an apocalyptic number.

It is an amenable number.

4518447145 is a deficient number, since it is larger than the sum of its proper divisors (903689435).

4518447145 is an equidigital number, since it uses as much as digits as its factorization.

4518447145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903689434.

The product of its digits is 358400, while the sum is 43.

The square root of 4518447145 is about 67219.3956012697. The cubic root of 4518447145 is about 1653.2165165750.

It can be divided in two parts, 45184 and 47145, that added together give a palindrome (92329).

The spelling of 4518447145 in words is "four billion, five hundred eighteen million, four hundred forty-seven thousand, one hundred forty-five".