216822978162 has 54 divisors (see below), whose sum is σ = 546517260783. Its totient is φ = 61945471224.

The previous prime is 216822978139. The next prime is 216822978181. The reversal of 216822978162 is 261879228612.

216822978162 is a `hidden beast` number, since 216 + 8 + 2 + 297 + 81 + 62 = 666.

216822978162 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 108411489081 + 108411489081 = 329259^2 + 329259^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=329259.

It is a junction number, because it is equal to n+sod(n) for n = 216822978099 and 216822978108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13821039 + ... + 13836717.

Almost surely, 2^216822978162 is an apocalyptic number.

216822978162 is an abundant number, since it is smaller than the sum of its proper divisors (329694282621).

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

216822978162 is an frugal number, since it uses more digits than its factorization.

216822978162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31380 (or 15691 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 216822978162 in words is "two hundred sixteen billion, eight hundred twenty-two million, nine hundred seventy-eight thousand, one hundred sixty-two".