4418521945 has 16 divisors (see below), whose sum is σ = 5348611728. Its totient is φ = 3503969280.

The previous prime is 4418521931. The next prime is 4418521949. The reversal of 4418521945 is 5491258144.

It can be written as a sum of positive squares in 8 ways, for example, as 2653641 + 4415868304 = 1629^2 + 66452^2 .

It is not a de Polignac number, because 4418521945 - 2⁹ = 4418521433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4418521949) 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 in 15 ways as a sum of consecutive naturals, for example, 514285 + ... + 522805.

It is an arithmetic number, because the mean of its divisors is an integer number (334288233).

Almost surely, 2^4418521945 is an apocalyptic number.

It is an amenable number.

4418521945 is a deficient number, since it is larger than the sum of its proper divisors (930089783).

4418521945 is a wasteful number, since it uses less digits than its factorization.

4418521945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9420.

The product of its digits is 230400, while the sum is 43.

The square root of 4418521945 is about 66471.9636012056. The cubic root of 4418521945 is about 1640.9386289824.

The spelling of 4418521945 in words is "four billion, four hundred eighteen million, five hundred twenty-one thousand, nine hundred forty-five".