444213312409 has 4 divisors (see below), whose sum is σ = 452594695716. Its totient is φ = 435831929104.

The previous prime is 444213312401. The next prime is 444213312419. The reversal of 444213312409 is 904213312444.

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 358699177225 + 85514135184 = 598915^2 + 292428^2 .

It is a cyclic number.

It is not a de Polignac number, because 444213312409 - 2³ = 444213312401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444213312401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190691574 + ... + 4190691679.

It is an arithmetic number, because the mean of its divisors is an integer number (113148673929).

Almost surely, 2^444213312409 is an apocalyptic number.

It is an amenable number.

444213312409 is a deficient number, since it is larger than the sum of its proper divisors (8381383307).

444213312409 is an equidigital number, since it uses as much as digits as its factorization.

444213312409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8381383306.

The product of its (nonzero) digits is 82944, while the sum is 37.

It can be divided in two parts, 444213312 and 409, that added together give a triangular number (444213721 = T₂₉₈₀₆).

The spelling of 444213312409 in words is "four hundred forty-four billion, two hundred thirteen million, three hundred twelve thousand, four hundred nine".