320733121165 has 32 divisors (see below), whose sum is σ = 401242761216. Its totient is φ = 245847060480.

The previous prime is 320733121141. The next prime is 320733121207. The reversal of 320733121165 is 561121337023.

It is not a de Polignac number, because 320733121165 - 2²³ = 320724732557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320733121165.

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 31 ways as a sum of consecutive naturals, for example, 17102784 + ... + 17121526.

It is an arithmetic number, because the mean of its divisors is an integer number (12538836288).

Almost surely, 2^320733121165 is an apocalyptic number.

It is an amenable number.

320733121165 is a deficient number, since it is larger than the sum of its proper divisors (80509640051).

320733121165 is a wasteful number, since it uses less digits than its factorization.

320733121165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19869.

The product of its (nonzero) digits is 22680, while the sum is 34.

Adding to 320733121165 its reverse (561121337023), we get a palindrome (881854458188).

The spelling of 320733121165 in words is "three hundred twenty billion, seven hundred thirty-three million, one hundred twenty-one thousand, one hundred sixty-five".