8161220108484 has 36 divisors (see below), whose sum is σ = 20748997960236. Its totient is φ = 2704681806528.

The previous prime is 8161220108453. The next prime is 8161220108497. The reversal of 8161220108484 is 4848010221618.

8161220108484 is a `hidden beast` number, since 8 + 1 + 61 + 2 + 2 + 0 + 108 + 484 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5647657190400 + 2513562918084 = 2376480^2 + 1585422^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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, 655197699 + ... + 655210154.

It is an arithmetic number, because the mean of its divisors is an integer number (576361054451).

Almost surely, 2^{8161220108484} is an apocalyptic number.

It is an amenable number.

8161220108484 is an abundant number, since it is smaller than the sum of its proper divisors (12587777851752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8161220108484 is a wasteful number, since it uses less digits than its factorization.

8161220108484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310408036 (or 1310408031 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The spelling of 8161220108484 in words is "eight trillion, one hundred sixty-one billion, two hundred twenty million, one hundred eight thousand, four hundred eighty-four".