320644355356 has 48 divisors (see below), whose sum is σ = 640142123040. Its totient is φ = 139218186240.

The previous prime is 320644355329. The next prime is 320644355387. The reversal of 320644355356 is 653553446023.

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 15 ways as a sum of consecutive naturals, for example, 1796851 + ... + 1967221.

It is an arithmetic number, because the mean of its divisors is an integer number (13336294230).

Almost surely, 2^320644355356 is an apocalyptic number.

It is an amenable number.

320644355356 is a deficient number, since it is larger than the sum of its proper divisors (319497767684).

320644355356 is a wasteful number, since it uses less digits than its factorization.

320644355356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172534 (or 172532 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 46.

The spelling of 320644355356 in words is "three hundred twenty billion, six hundred forty-four million, three hundred fifty-five thousand, three hundred fifty-six".