320345523453544 has 32 divisors (see below), whose sum is σ = 602384439333600. Its totient is φ = 159709681563840.

The previous prime is 320345523453521. The next prime is 320345523453559. The reversal of 320345523453544 is 445354325543023.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 320345523453491 and 320345523453500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335477527 + ... + 336431065.

It is an arithmetic number, because the mean of its divisors is an integer number (18824513729175).

Almost surely, 2^{320345523453544} is an apocalyptic number.

It is an amenable number.

320345523453544 is a deficient number, since it is larger than the sum of its proper divisors (282038915880056).

320345523453544 is a wasteful number, since it uses less digits than its factorization.

320345523453544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074913 (or 1074909 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 52.

Adding to 320345523453544 its reverse (445354325543023), we get a palindrome (765699848996567).

The spelling of 320345523453544 in words is "three hundred twenty trillion, three hundred forty-five billion, five hundred twenty-three million, four hundred fifty-three thousand, five hundred forty-four".