320665206441623 has 8 divisors (see below), whose sum is σ = 321858005198400. Its totient is φ = 319472413128288.

The previous prime is 320665206441583. The next prime is 320665206441653. The reversal of 320665206441623 is 326144602566023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320665206441623 - 2²⁰ = 320665205393047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320665206441653) 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, 146493173 + ... + 148666001.

It is an arithmetic number, because the mean of its divisors is an integer number (40232250649800).

Almost surely, 2^{320665206441623} is an apocalyptic number.

320665206441623 is a deficient number, since it is larger than the sum of its proper divisors (1192798756777).

320665206441623 is a wasteful number, since it uses less digits than its factorization.

320665206441623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721721.

The product of its (nonzero) digits is 7464960, while the sum is 50.

The spelling of 320665206441623 in words is "three hundred twenty trillion, six hundred sixty-five billion, two hundred six million, four hundred forty-one thousand, six hundred twenty-three".