216209035716 has 12 divisors (see below), whose sum is σ = 504487750032. Its totient is φ = 72069678568.

The previous prime is 216209035709. The next prime is 216209035717. The reversal of 216209035716 is 617530902612.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (216209035717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9008709810 + ... + 9008709833.

It is an arithmetic number, because the mean of its divisors is an integer number (42040645836).

Almost surely, 2^216209035716 is an apocalyptic number.

It is an amenable number.

216209035716 is an abundant number, since it is smaller than the sum of its proper divisors (288278714316).

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

216209035716 is a wasteful number, since it uses less digits than its factorization.

216209035716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18017419650 (or 18017419648 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 216209035716 in words is "two hundred sixteen billion, two hundred nine million, thirty-five thousand, seven hundred sixteen".