320540166013 has 4 divisors (see below), whose sum is σ = 324402095808. Its totient is φ = 316678236220.

The previous prime is 320540165999. The next prime is 320540166019. The reversal of 320540166013 is 310661045023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320540166013 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 (320540166019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1930964773 + ... + 1930964938.

It is an arithmetic number, because the mean of its divisors is an integer number (81100523952).

Almost surely, 2^320540166013 is an apocalyptic number.

It is an amenable number.

320540166013 is a deficient number, since it is larger than the sum of its proper divisors (3861929795).

320540166013 is an equidigital number, since it uses as much as digits as its factorization.

320540166013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861929794.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 320540166013 in words is "three hundred twenty billion, five hundred forty million, one hundred sixty-six thousand, thirteen".