444263435421 has 16 divisors (see below), whose sum is σ = 637969585344. Its totient is φ = 273370230144.

The previous prime is 444263435401. The next prime is 444263435423. The reversal of 444263435421 is 124534362444.

It is not a de Polignac number, because 444263435421 - 2¹⁹ = 444262911133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444263435423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11025 + ... + 942681.

It is an arithmetic number, because the mean of its divisors is an integer number (39873099084).

Almost surely, 2^444263435421 is an apocalyptic number.

It is an amenable number.

444263435421 is a deficient number, since it is larger than the sum of its proper divisors (193706149923).

444263435421 is a wasteful number, since it uses less digits than its factorization.

444263435421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943900.

The product of its digits is 1105920, while the sum is 42.

Adding to 444263435421 its reverse (124534362444), we get a palindrome (568797797865).

The spelling of 444263435421 in words is "four hundred forty-four billion, two hundred sixty-three million, four hundred thirty-five thousand, four hundred twenty-one".