320140442142440 has 16 divisors (see below), whose sum is σ = 720315994820580. Its totient is φ = 128056176856960.

The previous prime is 320140442142431. The next prime is 320140442142497. The reversal of 320140442142440 is 44241244041023.

It can be written as a sum of positive squares in 2 ways, for example, as 320137333633924 + 3108508516 = 17892382^2 + 55754^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320140442142440.

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 3 ways as a sum of consecutive naturals, for example, 4001755526741 + ... + 4001755526820.

Almost surely, 2^{320140442142440} is an apocalyptic number.

It is an amenable number.

320140442142440 is an abundant number, since it is smaller than the sum of its proper divisors (400175552678140).

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

320140442142440 is a wasteful number, since it uses less digits than its factorization.

320140442142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003511053572 (or 8003511053568 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 320140442142440 its reverse (44241244041023), we get a palindrome (364381686183463).

The spelling of 320140442142440 in words is "three hundred twenty trillion, one hundred forty billion, four hundred forty-two million, one hundred forty-two thousand, four hundred forty".