216353018816 has 112 divisors (see below), whose sum is σ = 489716064000. Its totient is φ = 93874513920.

The previous prime is 216353018741. The next prime is 216353018851. The reversal of 216353018816 is 618810353612.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8066420 + ... + 8093196.

Almost surely, 2^216353018816 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 216353018816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244858032000).

216353018816 is an abundant number, since it is smaller than the sum of its proper divisors (273363045184).

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

216353018816 is a wasteful number, since it uses less digits than its factorization.

216353018816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27322 (or 27312 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 216353018816 in words is "two hundred sixteen billion, three hundred fifty-three million, eighteen thousand, eight hundred sixteen".