444512551421 has 4 divisors (see below), whose sum is σ = 446505881472. Its totient is φ = 442519221372.

The previous prime is 444512551369. The next prime is 444512551489. The reversal of 444512551421 is 124155215444.

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 444512551421 - 2¹⁴ = 444512535037 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 (444502551421) 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, 996664691 + ... + 996665136.

It is an arithmetic number, because the mean of its divisors is an integer number (111626470368).

Almost surely, 2^444512551421 is an apocalyptic number.

It is an amenable number.

444512551421 is a deficient number, since it is larger than the sum of its proper divisors (1993330051).

444512551421 is a wasteful number, since it uses less digits than its factorization.

444512551421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1993330050.

The product of its digits is 128000, while the sum is 38.

Adding to 444512551421 its reverse (124155215444), we get a palindrome (568667766865).

The spelling of 444512551421 in words is "four hundred forty-four billion, five hundred twelve million, five hundred fifty-one thousand, four hundred twenty-one".