216849211788 has 48 divisors (see below), whose sum is σ = 552007177344. Its totient is φ = 65708624640.

The previous prime is 216849211757. The next prime is 216849211801. The reversal of 216849211788 is 887112948612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4833556 + ... + 4878212.

It is an arithmetic number, because the mean of its divisors is an integer number (11500149528).

Almost surely, 2^216849211788 is an apocalyptic number.

It is an amenable number.

216849211788 is an abundant number, since it is smaller than the sum of its proper divisors (335157965556).

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

216849211788 is a wasteful number, since it uses less digits than its factorization.

216849211788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81462 (or 81460 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 57.

The spelling of 216849211788 in words is "two hundred sixteen billion, eight hundred forty-nine million, two hundred eleven thousand, seven hundred eighty-eight".