320544899646 has 16 divisors (see below), whose sum is σ = 641099467008. Its totient is φ = 106846688600.

The previous prime is 320544899617. The next prime is 320544899671. The reversal of 320544899646 is 646998445023.

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 320544899646.

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 7 ways as a sum of consecutive naturals, for example, 71101 + ... + 803831.

It is an arithmetic number, because the mean of its divisors is an integer number (40068716688).

Almost surely, 2^320544899646 is an apocalyptic number.

320544899646 is an abundant number, since it is smaller than the sum of its proper divisors (320554567362).

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

320544899646 is a wasteful number, since it uses less digits than its factorization.

320544899646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805647.

The product of its (nonzero) digits is 44789760, while the sum is 60.

The spelling of 320544899646 in words is "three hundred twenty billion, five hundred forty-four million, eight hundred ninety-nine thousand, six hundred forty-six".