216915503168 has 112 divisors (see below), whose sum is σ = 538754482560. Its totient is φ = 84358139904.

The previous prime is 216915503017. The next prime is 216915503171. The reversal of 216915503168 is 861305519612.

It is a tau number, because it is divible by the number of its divisors (112).

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, 27980 + ... + 659252.

It is an arithmetic number, because the mean of its divisors is an integer number (4810307880).

Almost surely, 2^216915503168 is an apocalyptic number.

216915503168 is a gapful number since it is divisible by the number (28) 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 216915503168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269377241280).

216915503168 is an abundant number, since it is smaller than the sum of its proper divisors (321838979392).

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

216915503168 is a wasteful number, since it uses less digits than its factorization.

216915503168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631364 (or 631354 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 216915503168 in words is "two hundred sixteen billion, nine hundred fifteen million, five hundred three thousand, one hundred sixty-eight".