320500406646 has 48 divisors (see below), whose sum is σ = 796913159328. Its totient is φ = 91191571200.

The previous prime is 320500406609. The next prime is 320500406651. The reversal of 320500406646 is 646604005023.

320500406646 is a `hidden beast` number, since 3 + 2 + 0 + 5 + 0 + 0 + 4 + 0 + 6 + 646 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320500406646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5246925 + ... + 5307656.

It is an arithmetic number, because the mean of its divisors is an integer number (16602357486).

Almost surely, 2^320500406646 is an apocalyptic number.

320500406646 is an abundant number, since it is smaller than the sum of its proper divisors (476412752682).

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

320500406646 is a wasteful number, since it uses less digits than its factorization.

320500406646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554837 (or 10554834 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 320500406646 in words is "three hundred twenty billion, five hundred million, four hundred six thousand, six hundred forty-six".