320543246550564 has 18 divisors (see below), whose sum is σ = 810262095447350. Its totient is φ = 106847748850176.

The previous prime is 320543246550551. The next prime is 320543246550601. The reversal of 320543246550564 is 465055642345023.

320543246550564 is a `hidden beast` number, since 3 + 2 + 0 + 5 + 4 + 3 + 24 + 6 + 5 + 50 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 316842848006400 + 3700398544164 = 17800080^2 + 1923642^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 320543246550564.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 4451989535389 + ... + 4451989535460.

Almost surely, 2^{320543246550564} is an apocalyptic number.

It is an amenable number.

320543246550564 is an abundant number, since it is smaller than the sum of its proper divisors (489718848896786).

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

320543246550564 is a wasteful number, since it uses less digits than its factorization.

320543246550564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8903979070859 (or 8903979070854 counting only the distinct ones).

The product of its (nonzero) digits is 51840000, while the sum is 54.

Adding to 320543246550564 its reverse (465055642345023), we get a palindrome (785598888895587).

The spelling of 320543246550564 in words is "three hundred twenty trillion, five hundred forty-three billion, two hundred forty-six million, five hundred fifty thousand, five hundred sixty-four".