216854433964 has 12 divisors (see below), whose sum is σ = 433708867984. Its totient is φ = 92937614544.

The previous prime is 216854433923. The next prime is 216854434003. The reversal of 216854433964 is 469334458612.

It is a happy number.

216854433964 is an admirable 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, 3872400579 + ... + 3872400634.

Almost surely, 2^216854433964 is an apocalyptic number.

It is an amenable number.

216854433964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216854433964 is a wasteful number, since it uses less digits than its factorization.

216854433964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744801224 (or 7744801222 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 55.

The spelling of 216854433964 in words is "two hundred sixteen billion, eight hundred fifty-four million, four hundred thirty-three thousand, nine hundred sixty-four".