216658939381389 has 24 divisors (see below), whose sum is σ = 316229738098560. Its totient is φ = 142928525387232.

The previous prime is 216658939381327. The next prime is 216658939381399. The reversal of 216658939381389 is 983183939856612.

It is a happy number.

216658939381389 is a `hidden beast` number, since 2 + 1 + 6 + 65 + 8 + 93 + 93 + 8 + 1 + 389 = 666.

It is not a de Polignac number, because 216658939381389 - 2¹¹ = 216658939379341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216658939381309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87374914 + ... + 89820339.

It is an arithmetic number, because the mean of its divisors is an integer number (13176239087440).

Almost surely, 2^{216658939381389} is an apocalyptic number.

It is an amenable number.

216658939381389 is a deficient number, since it is larger than the sum of its proper divisors (99570798717171).

216658939381389 is a wasteful number, since it uses less digits than its factorization.

216658939381389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177196681 (or 177196678 counting only the distinct ones).

The product of its digits is 3627970560, while the sum is 81.

The spelling of 216658939381389 in words is "two hundred sixteen trillion, six hundred fifty-eight billion, nine hundred thirty-nine million, three hundred eighty-one thousand, three hundred eighty-nine".