420444044441 has 4 divisors (see below), whose sum is σ = 434006755584. Its totient is φ = 406881333300.

The previous prime is 420444044417. The next prime is 420444044453. The reversal of 420444044441 is 144440444024.

It is a happy number.

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 not a de Polignac number, because 420444044441 - 2¹⁰ = 420444043417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420444044411) 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, 6781355525 + ... + 6781355586.

It is an arithmetic number, because the mean of its divisors is an integer number (108501688896).

Almost surely, 2^420444044441 is an apocalyptic number.

It is an amenable number.

420444044441 is a deficient number, since it is larger than the sum of its proper divisors (13562711143).

420444044441 is a wasteful number, since it uses less digits than its factorization.

420444044441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13562711142.

The product of its (nonzero) digits is 131072, while the sum is 35.

Adding to 420444044441 its reverse (144440444024), we get a palindrome (564884488465).

The spelling of 420444044441 in words is "four hundred twenty billion, four hundred forty-four million, forty-four thousand, four hundred forty-one".