423644211444 has 96 divisors (see below), whose sum is σ = 1063203394176. Its totient is φ = 130809507840.

The previous prime is 423644211439. The next prime is 423644211449. The reversal of 423644211444 is 444112446324.

It is an interprime number because it is at equal distance from previous prime (423644211439) and next prime (423644211449).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423644211449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16292934 + ... + 16318914.

It is an arithmetic number, because the mean of its divisors is an integer number (11075035356).

Almost surely, 2^423644211444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423644211444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (531601697088).

423644211444 is an abundant number, since it is smaller than the sum of its proper divisors (639559182732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423644211444 is a wasteful number, since it uses less digits than its factorization.

423644211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27265 (or 27263 counting only the distinct ones).

The product of its digits is 294912, while the sum is 39.

Adding to 423644211444 its reverse (444112446324), we get a palindrome (867756657768).

The spelling of 423644211444 in words is "four hundred twenty-three billion, six hundred forty-four million, two hundred eleven thousand, four hundred forty-four".