216355646553612 has 12 divisors (see below), whose sum is σ = 504829841958456. Its totient is φ = 72118548851200.

The previous prime is 216355646553589. The next prime is 216355646553721.

216355646553612 is nontrivially palindromic in base 10.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9014818606389 + ... + 9014818606412.

It is an arithmetic number, because the mean of its divisors is an integer number (42069153496538).

Almost surely, 2^{216355646553612} is an apocalyptic number.

It is an amenable number.

216355646553612 is an abundant number, since it is smaller than the sum of its proper divisors (288474195404844).

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

216355646553612 is a wasteful number, since it uses less digits than its factorization.

216355646553612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18029637212808 (or 18029637212806 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 60.

The spelling of 216355646553612 in words is "two hundred sixteen trillion, three hundred fifty-five billion, six hundred forty-six million, five hundred fifty-three thousand, six hundred twelve".