320513444544 has 56 divisors (see below), whose sum is σ = 897908997168. Its totient is φ = 100553236480.

The previous prime is 320513444509. The next prime is 320513444579. The reversal of 320513444544 is 445444315023.

It is an interprime number because it is at equal distance from previous prime (320513444509) and next prime (320513444579).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49094997 + ... + 49101524.

Almost surely, 2^320513444544 is an apocalyptic number.

320513444544 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

320513444544 is an abundant number, since it is smaller than the sum of its proper divisors (577395552624).

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

320513444544 is a wasteful number, since it uses less digits than its factorization.

320513444544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98196553 (or 98196543 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 39.

Adding to 320513444544 its reverse (445444315023), we get a palindrome (765957759567).

The spelling of 320513444544 in words is "three hundred twenty billion, five hundred thirteen million, four hundred forty-four thousand, five hundred forty-four".