444040413421 has 4 divisors (see below), whose sum is σ = 484407723744. Its totient is φ = 403673103100.

The previous prime is 444040413403. The next prime is 444040413431. The reversal of 444040413421 is 124314040444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444040413421 - 2²⁷ = 443906195693 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444040413431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20183655145 + ... + 20183655166.

It is an arithmetic number, because the mean of its divisors is an integer number (121101930936).

Almost surely, 2^444040413421 is an apocalyptic number.

It is an amenable number.

444040413421 is a deficient number, since it is larger than the sum of its proper divisors (40367310323).

444040413421 is a wasteful number, since it uses less digits than its factorization.

444040413421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40367310322.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 444040413421 its reverse (124314040444), we get a palindrome (568354453865).

The spelling of 444040413421 in words is "four hundred forty-four billion, forty million, four hundred thirteen thousand, four hundred twenty-one".