320131444432 has 20 divisors (see below), whose sum is σ = 621057096900. Its totient is φ = 159858645248.

The previous prime is 320131444427. The next prime is 320131444447. The reversal of 320131444432 is 234444131023.

It can be written as a sum of positive squares in 2 ways, for example, as 71365916736 + 248765527696 = 267144^2 + 498764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320131444394 and 320131444403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12929557 + ... + 12954292.

It is an arithmetic number, because the mean of its divisors is an integer number (31052854845).

Almost surely, 2^320131444432 is an apocalyptic number.

It is an amenable number.

320131444432 is a deficient number, since it is larger than the sum of its proper divisors (300925652468).

320131444432 is a wasteful number, since it uses less digits than its factorization.

320131444432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25884630 (or 25884624 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 320131444432 its reverse (234444131023), we get a palindrome (554575575455).

The spelling of 320131444432 in words is "three hundred twenty billion, one hundred thirty-one million, four hundred forty-four thousand, four hundred thirty-two".