320606221824 has 320 divisors, whose sum is σ = 1098007342080. Its totient is φ = 91599538176.

The previous prime is 320606221783. The next prime is 320606221913. The reversal of 320606221824 is 428122606023.

320606221824 is a `hidden beast` number, since 3 + 2 + 0 + 6 + 0 + 622 + 1 + 8 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 7817757 + ... + 7858659.

It is an arithmetic number, because the mean of its divisors is an integer number (3431272944).

Almost surely, 2^320606221824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320606221824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549003671040).

320606221824 is an abundant number, since it is smaller than the sum of its proper divisors (777401120256).

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

320606221824 is an frugal number, since it uses more digits than its factorization.

320606221824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40949 (or 40915 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

Adding to 320606221824 its reverse (428122606023), we get a palindrome (748728827847).

The spelling of 320606221824 in words is "three hundred twenty billion, six hundred six million, two hundred twenty-one thousand, eight hundred twenty-four".