320440053552 has 80 divisors (see below), whose sum is σ = 841668555360. Its totient is φ = 105025536000.

The previous prime is 320440053467. The next prime is 320440053553. The reversal of 320440053552 is 255350044023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320440053553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9085552 + ... + 9120752.

It is an arithmetic number, because the mean of its divisors is an integer number (10520856942).

Almost surely, 2^320440053552 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 320440053552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420834277680).

320440053552 is an abundant number, since it is smaller than the sum of its proper divisors (521228501808).

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

320440053552 is a wasteful number, since it uses less digits than its factorization.

320440053552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38382 (or 38376 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 33.

Adding to 320440053552 its reverse (255350044023), we get a palindrome (575790097575).

The spelling of 320440053552 in words is "three hundred twenty billion, four hundred forty million, fifty-three thousand, five hundred fifty-two".