216718835028 has 24 divisors (see below), whose sum is σ = 508218379200. Its totient is φ = 71876597760.

The previous prime is 216718834993. The next prime is 216718835029. The reversal of 216718835028 is 820538817612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216718835029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45374253 + ... + 45379028.

It is an arithmetic number, because the mean of its divisors is an integer number (21175765800).

Almost surely, 2^216718835028 is an apocalyptic number.

It is an amenable number.

216718835028 is an abundant number, since it is smaller than the sum of its proper divisors (291499544172).

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

216718835028 is a wasteful number, since it uses less digits than its factorization.

216718835028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90753487 (or 90753485 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 216718835028 in words is "two hundred sixteen billion, seven hundred eighteen million, eight hundred thirty-five thousand, twenty-eight".