320641153 has 24 divisors (see below), whose sum is σ = 394056960. Its totient is φ = 259731360.

The previous prime is 320641147. The next prime is 320641177. The reversal of 320641153 is 351146023.

It is not a de Polignac number, because 320641153 - 2⁵ = 320641121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320641133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62863 + ... + 67771.

It is an arithmetic number, because the mean of its divisors is an integer number (16419040).

Almost surely, 2^320641153 is an apocalyptic number.

It is an amenable number.

320641153 is a deficient number, since it is larger than the sum of its proper divisors (73415807).

320641153 is a wasteful number, since it uses less digits than its factorization.

320641153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 320641153 is about 17906.4556236012. The cubic root of 320641153 is about 684.4468890045.

Adding to 320641153 its reverse (351146023), we get a palindrome (671787176).

The spelling of 320641153 in words is "three hundred twenty million, six hundred forty-one thousand, one hundred fifty-three".