217668984652 has 12 divisors (see below), whose sum is σ = 435337969360. Its totient is φ = 93286707696.

The previous prime is 217668984641. The next prime is 217668984679. The reversal of 217668984652 is 256489866712.

217668984652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

217668984652 is an admirable number.

It is a super-2 number, since 2×217668984652² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886946127 + ... + 3886946182.

Almost surely, 2^217668984652 is an apocalyptic number.

It is an amenable number.

217668984652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

217668984652 is a wasteful number, since it uses less digits than its factorization.

217668984652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773892320 (or 7773892318 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 64.

The spelling of 217668984652 in words is "two hundred seventeen billion, six hundred sixty-eight million, nine hundred eighty-four thousand, six hundred fifty-two".