216646341476644 has 12 divisors (see below), whose sum is σ = 379177497237168. Its totient is φ = 108309913694600.

The previous prime is 216646341476633. The next prime is 216646341476681. The reversal of 216646341476644 is 446674143646612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3314224162 + ... + 3314289529.

It is an arithmetic number, because the mean of its divisors is an integer number (31598124769764).

Almost surely, 2^{216646341476644} is an apocalyptic number.

It is an amenable number.

216646341476644 is a deficient number, since it is larger than the sum of its proper divisors (162531155760524).

216646341476644 is a wasteful number, since it uses less digits than its factorization.

216646341476644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6628521866 (or 6628521864 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 64.

The spelling of 216646341476644 in words is "two hundred sixteen trillion, six hundred forty-six billion, three hundred forty-one million, four hundred seventy-six thousand, six hundred forty-four".