216988057983708 has 288 divisors, whose sum is σ = 646465350795264. Its totient is φ = 60682303440000.

The previous prime is 216988057983689. The next prime is 216988057983751. The reversal of 216988057983708 is 807389750889612.

216988057983708 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 8 + 8 + 0 + 579 + 8 + 37 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 92296293 + ... + 94618083.

It is an arithmetic number, because the mean of its divisors is an integer number (2244671356928).

Almost surely, 2^{216988057983708} 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 216988057983708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323232675397632).

216988057983708 is an abundant number, since it is smaller than the sum of its proper divisors (429477292811556).

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

216988057983708 is a wasteful number, since it uses less digits than its factorization.

216988057983708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322197 (or 2322192 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 81.

The spelling of 216988057983708 in words is "two hundred sixteen trillion, nine hundred eighty-eight billion, fifty-seven million, nine hundred eighty-three thousand, seven hundred eight".