320231541650440 has 128 divisors (see below), whose sum is σ = 836111599488000. Its totient is φ = 108113248309248.

The previous prime is 320231541650431. The next prime is 320231541650459. The reversal of 320231541650440 is 44056145132023.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 320231541650393 and 320231541650402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11155425 + ... + 27656944.

It is an arithmetic number, because the mean of its divisors is an integer number (6532121871000).

Almost surely, 2^{320231541650440} is an apocalyptic number.

It is an amenable number.

320231541650440 is an abundant number, since it is smaller than the sum of its proper divisors (515880057837560).

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

320231541650440 is a wasteful number, since it uses less digits than its factorization.

320231541650440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38812839 (or 38812835 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 320231541650440 its reverse (44056145132023), we get a palindrome (364287686782463).

The spelling of 320231541650440 in words is "three hundred twenty trillion, two hundred thirty-one billion, five hundred forty-one million, six hundred fifty thousand, four hundred forty".