216723650832 has 120 divisors (see below), whose sum is σ = 653483882688. Its totient is φ = 66653280000.

The previous prime is 216723650813. The next prime is 216723650861. The reversal of 216723650832 is 238056327612.

216723650832 is a `hidden beast` number, since 2 + 16 + 72 + 36 + 508 + 32 = 666.

216723650832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 4188157 + ... + 4239587.

Almost surely, 2^216723650832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216723650832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326741941344).

216723650832 is an abundant number, since it is smaller than the sum of its proper divisors (436760231856).

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

216723650832 is a wasteful number, since it uses less digits than its factorization.

216723650832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53709 (or 53700 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 216723650832 in words is "two hundred sixteen billion, seven hundred twenty-three million, six hundred fifty thousand, eight hundred thirty-two".