320556434230016 has 54 divisors (see below), whose sum is σ = 675310041060732. Its totient is φ = 151842521433600.

The previous prime is 320556434230013. The next prime is 320556434230057. The reversal of 320556434230016 is 610032434655023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320556434230013) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1734220010 + ... + 1734404841.

Almost surely, 2^{320556434230016} is an apocalyptic number.

It is an amenable number.

320556434230016 is an abundant number, since it is smaller than the sum of its proper divisors (354753606830716).

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

320556434230016 is an equidigital number, since it uses as much as digits as its factorization.

320556434230016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468624905 (or 3468624872 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 44.

Adding to 320556434230016 its reverse (610032434655023), we get a palindrome (930588868885039).

The spelling of 320556434230016 in words is "three hundred twenty trillion, five hundred fifty-six billion, four hundred thirty-four million, two hundred thirty thousand, sixteen".