320345015344544 has 48 divisors (see below), whose sum is σ = 684065297340936. Its totient is φ = 147073751654400.

The previous prime is 320345015344537. The next prime is 320345015344631. The reversal of 320345015344544 is 445443510543023.

It can be written as a sum of positive squares in 4 ways, for example, as 182255724044944 + 138089291299600 = 13500212^2 + 11751140^2 .

It is a super-2 number, since 2×320345015344544² (a number of 30 digits) contains 22 as substring.

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, 7181313227 + ... + 7181357834.

Almost surely, 2^{320345015344544} is an apocalyptic number.

320345015344544 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

320345015344544 is an abundant number, since it is smaller than the sum of its proper divisors (363720281996392).

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

320345015344544 is a wasteful number, since it uses less digits than its factorization.

320345015344544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14362671129 (or 14362671121 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 47.

Adding to 320345015344544 its reverse (445443510543023), we get a palindrome (765788525887567).

The spelling of 320345015344544 in words is "three hundred twenty trillion, three hundred forty-five billion, fifteen million, three hundred forty-four thousand, five hundred forty-four".