320040423544 has 8 divisors (see below), whose sum is σ = 600075794160. Its totient is φ = 160020211768.

The previous prime is 320040423541. The next prime is 320040423557. The reversal of 320040423544 is 445324040023.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320040423541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002526464 + ... + 20002526479.

It is an arithmetic number, because the mean of its divisors is an integer number (75009474270).

Almost surely, 2^320040423544 is an apocalyptic number.

It is an amenable number.

320040423544 is a deficient number, since it is larger than the sum of its proper divisors (280035370616).

320040423544 is a wasteful number, since it uses less digits than its factorization.

320040423544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40005052949 (or 40005052945 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 320040423544 its reverse (445324040023), we get a palindrome (765364463567).

The spelling of 320040423544 in words is "three hundred twenty billion, forty million, four hundred twenty-three thousand, five hundred forty-four".