331644643332 has 96 divisors (see below), whose sum is σ = 836973688320. Its totient is φ = 101869125120.

The previous prime is 331644643279. The next prime is 331644643333. The reversal of 331644643332 is 233346446133.

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

It is not an unprimeable number, because it can be changed into a prime (331644643333) 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, 2292583 + ... + 2432945.

It is an arithmetic number, because the mean of its divisors is an integer number (8718475920).

Almost surely, 2^331644643332 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 331644643332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418486844160).

331644643332 is an abundant number, since it is smaller than the sum of its proper divisors (505329044988).

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

331644643332 is a wasteful number, since it uses less digits than its factorization.

331644643332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140673 (or 140671 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 42.

The spelling of 331644643332 in words is "three hundred thirty-one billion, six hundred forty-four million, six hundred forty-three thousand, three hundred thirty-two".