216683386612 has 24 divisors (see below), whose sum is σ = 472763753280. Its totient is φ = 84422098560.

The previous prime is 216683386589. The next prime is 216683386637.

216683386612 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 216683386612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351758437 + ... + 351759052.

It is an arithmetic number, because the mean of its divisors is an integer number (19698489720).

Almost surely, 2^216683386612 is an apocalyptic number.

216683386612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216683386612 is an abundant number, since it is smaller than the sum of its proper divisors (256080366668).

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

216683386612 is a wasteful number, since it uses less digits than its factorization.

216683386612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703517511 (or 703517509 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 52.

The spelling of 216683386612 in words is "two hundred sixteen billion, six hundred eighty-three million, three hundred eighty-six thousand, six hundred twelve".