4443381685 has 4 divisors (see below), whose sum is σ = 5332058028. Its totient is φ = 3554705344.

The previous prime is 4443381637. The next prime is 4443381697. The reversal of 4443381685 is 5861833444.

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 3516727204 + 926654481 = 59302^2 + 30441^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443381685 - 2⁷ = 4443381557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 444338164 + ... + 444338173.

It is an arithmetic number, because the mean of its divisors is an integer number (1333014507).

Almost surely, 2^4443381685 is an apocalyptic number.

It is an amenable number.

4443381685 is a deficient number, since it is larger than the sum of its proper divisors (888676343).

4443381685 is an equidigital number, since it uses as much as digits as its factorization.

4443381685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888676342.

The product of its digits is 1105920, while the sum is 46.

The square root of 4443381685 is about 66658.6954942864. The cubic root of 4443381685 is about 1644.0103229313.

The spelling of 4443381685 in words is "four billion, four hundred forty-three million, three hundred eighty-one thousand, six hundred eighty-five".