216910210608 has 960 divisors, whose sum is σ = 823787274240. Its totient is φ = 54083635200.

The previous prime is 216910210607. The next prime is 216910210631. The reversal of 216910210608 is 806012019612.

216910210608 is a `hidden beast` number, since 2 + 16 + 9 + 10 + 21 + 0 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (216910210607) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 400942818 + ... + 400943358.

It is an arithmetic number, because the mean of its divisors is an integer number (858111744).

Almost surely, 2^216910210608 is an apocalyptic number.

216910210608 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 216910210608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411893637120).

216910210608 is an abundant number, since it is smaller than the sum of its proper divisors (606877063632).

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

216910210608 is a wasteful number, since it uses less digits than its factorization.

216910210608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 216910210608 in words is "two hundred sixteen billion, nine hundred ten million, two hundred ten thousand, six hundred eight".