216204550500 has 96 divisors (see below), whose sum is σ = 629929198080. Its totient is φ = 57623270400.

The previous prime is 216204550477. The next prime is 216204550501. The reversal of 216204550500 is 5055402612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (216204550501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2795349 + ... + 2871651.

It is an arithmetic number, because the mean of its divisors is an integer number (6561762480).

Almost surely, 2^216204550500 is an apocalyptic number.

216204550500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216204550500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314964599040).

216204550500 is an abundant number, since it is smaller than the sum of its proper divisors (413724647580).

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

216204550500 is a wasteful number, since it uses less digits than its factorization.

216204550500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78214 (or 78202 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 216204550500 in words is "two hundred sixteen billion, two hundred four million, five hundred fifty thousand, five hundred".