216885321844 has 12 divisors (see below), whose sum is σ = 379571807104. Its totient is φ = 108436234104.

The previous prime is 216885321833. The next prime is 216885321871. The reversal of 216885321844 is 448123588612.

It is a junction number, because it is equal to n+sod(n) for n = 216885321791 and 216885321800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530372 + ... + 1666075.

Almost surely, 2^216885321844 is an apocalyptic number.

It is an amenable number.

216885321844 is a deficient number, since it is larger than the sum of its proper divisors (162686485260).

216885321844 is a wasteful number, since it uses less digits than its factorization.

216885321844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213414 (or 3213412 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 52.

The spelling of 216885321844 in words is "two hundred sixteen billion, eight hundred eighty-five million, three hundred twenty-one thousand, eight hundred forty-four".