216565710612 has 12 divisors (see below), whose sum is σ = 505319991456. Its totient is φ = 72188570200.

The previous prime is 216565710601. The next prime is 216565710631. The reversal of 216565710612 is 216017565612.

216565710612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 9023571264 + ... + 9023571287.

It is an arithmetic number, because the mean of its divisors is an integer number (42109999288).

Almost surely, 2^216565710612 is an apocalyptic number.

It is an amenable number.

216565710612 is an abundant number, since it is smaller than the sum of its proper divisors (288754280844).

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

216565710612 is a wasteful number, since it uses less digits than its factorization.

216565710612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18047142558 (or 18047142556 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 216565710612 in words is "two hundred sixteen billion, five hundred sixty-five million, seven hundred ten thousand, six hundred twelve".