216664111604 has 24 divisors (see below), whose sum is σ = 380883293280. Its totient is φ = 107840441696.

The previous prime is 216664111591. The next prime is 216664111613. The reversal of 216664111604 is 406111466612.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 10983302 + ... + 11003010.

It is an arithmetic number, because the mean of its divisors is an integer number (15870137220).

Almost surely, 2^216664111604 is an apocalyptic number.

It is an amenable number.

216664111604 is a deficient number, since it is larger than the sum of its proper divisors (164219181676).

216664111604 is a wasteful number, since it uses less digits than its factorization.

216664111604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32047 (or 32045 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 216664111604 in words is "two hundred sixteen billion, six hundred sixty-four million, one hundred eleven thousand, six hundred four".