320701260161 has 4 divisors (see below), whose sum is σ = 326136874800. Its totient is φ = 315265645524.

The previous prime is 320701260157. The next prime is 320701260179. The reversal of 320701260161 is 161062107023.

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 not a de Polignac number, because 320701260161 - 2² = 320701260157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320701260181) 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, 2717807231 + ... + 2717807348.

It is an arithmetic number, because the mean of its divisors is an integer number (81534218700).

Almost surely, 2^320701260161 is an apocalyptic number.

It is an amenable number.

320701260161 is a deficient number, since it is larger than the sum of its proper divisors (5435614639).

320701260161 is an equidigital number, since it uses as much as digits as its factorization.

320701260161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435614638.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 320701260161 its reverse (161062107023), we get a palindrome (481763367184).

The spelling of 320701260161 in words is "three hundred twenty billion, seven hundred one million, two hundred sixty thousand, one hundred sixty-one".