444203222985 has 12 divisors (see below), whose sum is σ = 769952253252. Its totient is φ = 236908385568.

The previous prime is 444203222873. The next prime is 444203222987. The reversal of 444203222985 is 589222302444.

It can be written as a sum of positive squares in 2 ways, for example, as 204850380816 + 239352842169 = 452604^2 + 489237^2 .

It is not a de Polignac number, because 444203222985 - 2⁹ = 444203222473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9871182733 = 444203222985 / (4 + 4 + 4 + 2 + 0 + 3 + 2 + 2 + 2 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 444203222985.

It is not an unprimeable number, because it can be changed into a prime (444203222987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4935591322 + ... + 4935591411.

It is an arithmetic number, because the mean of its divisors is an integer number (64162687771).

Almost surely, 2^444203222985 is an apocalyptic number.

444203222985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

444203222985 is a deficient number, since it is larger than the sum of its proper divisors (325749030267).

444203222985 is a wasteful number, since it uses less digits than its factorization.

444203222985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871182744 (or 9871182741 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 444203222985 in words is "four hundred forty-four billion, two hundred three million, two hundred twenty-two thousand, nine hundred eighty-five".