320243056016 has 40 divisors (see below), whose sum is σ = 672455569464. Its totient is φ = 146863042560.

The previous prime is 320243056009. The next prime is 320243056019. The reversal of 320243056016 is 610650342023.

It can be written as a sum of positive squares in 4 ways, for example, as 47174102416 + 273068953600 = 217196^2 + 522560^2 .

It is a super-2 number, since 2×320243056016² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320243056019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4870625 + ... + 4935936.

Almost surely, 2^320243056016 is an apocalyptic number.

It is an amenable number.

320243056016 is an abundant number, since it is smaller than the sum of its proper divisors (352212513448).

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

320243056016 is a wasteful number, since it uses less digits than its factorization.

320243056016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806739 (or 9806733 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 320243056016 its reverse (610650342023), we get a palindrome (930893398039).

The spelling of 320243056016 in words is "three hundred twenty billion, two hundred forty-three million, fifty-six thousand, sixteen".