216327128128 has 28 divisors (see below), whose sum is σ = 454525567452. Its totient is φ = 101801000960.

The previous prime is 216327128093. The next prime is 216327128159. The reversal of 216327128128 is 821821723612.

It can be written as a sum of positive squares in 2 ways, for example, as 69797412864 + 146529715264 = 264192^2 + 382792^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99413953 + ... + 99416128.

Almost surely, 2^216327128128 is an apocalyptic number.

It is an amenable number.

216327128128 is an abundant number, since it is smaller than the sum of its proper divisors (238198439324).

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

216327128128 is a wasteful number, since it uses less digits than its factorization.

216327128128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198830110 (or 198830100 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The spelling of 216327128128 in words is "two hundred sixteen billion, three hundred twenty-seven million, one hundred twenty-eight thousand, one hundred twenty-eight".