444444444391 has 4 divisors (see below), whose sum is σ = 458781361984. Its totient is φ = 430107526800.

The previous prime is 444444444377. The next prime is 444444444401. The reversal of 444444444391 is 193444444444.

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

It is a cyclic number.

It is not a de Polignac number, because 444444444391 - 2³³ = 435854509799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444444444371) 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, 7168458750 + ... + 7168458811.

It is an arithmetic number, because the mean of its divisors is an integer number (114695340496).

Almost surely, 2^444444444391 is an apocalyptic number.

444444444391 is a deficient number, since it is larger than the sum of its proper divisors (14336917593).

444444444391 is a wasteful number, since it uses less digits than its factorization.

444444444391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14336917592.

The product of its digits is 7077888, while the sum is 49.

The spelling of 444444444391 in words is "four hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, three hundred ninety-one".