320216644161 has 12 divisors (see below), whose sum is σ = 462665600592. Its totient is φ = 213417556056.

The previous prime is 320216644159. The next prime is 320216644169. The reversal of 320216644161 is 161446612023.

320216644161 is a `hidden beast` number, since 3 + 2 + 0 + 2 + 1 + 6 + 644 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 320216644161 - 2¹ = 320216644159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320216644169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4983531 + ... + 5047376.

It is an arithmetic number, because the mean of its divisors is an integer number (38555466716).

Almost surely, 2^320216644161 is an apocalyptic number.

It is an amenable number.

320216644161 is a deficient number, since it is larger than the sum of its proper divisors (142448956431).

320216644161 is a wasteful number, since it uses less digits than its factorization.

320216644161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034460 (or 10034457 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 320216644161 in words is "three hundred twenty billion, two hundred sixteen million, six hundred forty-four thousand, one hundred sixty-one".