216979983360 has 704 divisors, whose sum is σ = 919676160000. Its totient is φ = 47434235904.

The previous prime is 216979983359. The next prime is 216979983373. The reversal of 216979983360 is 63389979612.

216979983360 is a `hidden beast` number, since 21 + 6 + 97 + 99 + 83 + 360 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22251766 + ... + 22261514.

Almost surely, 2^216979983360 is an apocalyptic number.

216979983360 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 216979983360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459838080000).

216979983360 is an abundant number, since it is smaller than the sum of its proper divisors (702696176640).

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

216979983360 is a wasteful number, since it uses less digits than its factorization.

216979983360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9813 (or 9789 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 216979983360 in words is "two hundred sixteen billion, nine hundred seventy-nine million, nine hundred eighty-three thousand, three hundred sixty".