444412144021 has 4 divisors (see below), whose sum is σ = 447073294752. Its totient is φ = 441750993292.

The previous prime is 444412144009. The next prime is 444412144037. The reversal of 444412144021 is 120441214444.

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 444412144021 - 2¹¹ = 444412141973 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 (444412144621) 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, 1330575115 + ... + 1330575448.

It is an arithmetic number, because the mean of its divisors is an integer number (111768323688).

Almost surely, 2^444412144021 is an apocalyptic number.

It is an amenable number.

444412144021 is a deficient number, since it is larger than the sum of its proper divisors (2661150731).

444412144021 is a wasteful number, since it uses less digits than its factorization.

444412144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661150730.

The product of its (nonzero) digits is 16384, while the sum is 31.

Adding to 444412144021 its reverse (120441214444), we get a palindrome (564853358465).

The spelling of 444412144021 in words is "four hundred forty-four billion, four hundred twelve million, one hundred forty-four thousand, twenty-one".