320640063 has 16 divisors (see below), whose sum is σ = 437391360. Its totient is φ = 208840736.

The previous prime is 320640059. The next prime is 320640097. The reversal of 320640063 is 360046023.

It is a cyclic number.

It is not a de Polignac number, because 320640063 - 2² = 320640059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320640013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93778 + ... + 97136.

It is an arithmetic number, because the mean of its divisors is an integer number (27336960).

Almost surely, 2^320640063 is an apocalyptic number.

320640063 is a deficient number, since it is larger than the sum of its proper divisors (116751297).

320640063 is a wasteful number, since it uses less digits than its factorization.

320640063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 320640063 is about 17906.4251876247. The cubic root of 320640063 is about 684.4461134252.

Adding to 320640063 its reverse (360046023), we get a palindrome (680686086).

The spelling of 320640063 in words is "three hundred twenty million, six hundred forty thousand, sixty-three".