320535444140 has 24 divisors (see below), whose sum is σ = 674730952560. Its totient is φ = 127908173888.

The previous prime is 320535444137. The next prime is 320535444161. The reversal of 320535444140 is 41444535023.

It is a self number, because there is not a number n which added to its sum of digits gives 320535444140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19116647 + ... + 19133406.

It is an arithmetic number, because the mean of its divisors is an integer number (28113789690).

Almost surely, 2^320535444140 is an apocalyptic number.

It is an amenable number.

320535444140 is an abundant number, since it is smaller than the sum of its proper divisors (354195508420).

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

320535444140 is a wasteful number, since it uses less digits than its factorization.

320535444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38250481 (or 38250479 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 320535444140 its reverse (41444535023), we get a palindrome (361979979163).

The spelling of 320535444140 in words is "three hundred twenty billion, five hundred thirty-five million, four hundred forty-four thousand, one hundred forty".