217630443916 has 24 divisors (see below), whose sum is σ = 384265057680. Its totient is φ = 107840635392.

The previous prime is 217630443913. The next prime is 217630443949. The reversal of 217630443916 is 619344036712.

It is not an unprimeable number, because it can be changed into a prime (217630443913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5452480 + ... + 5492248.

It is an arithmetic number, because the mean of its divisors is an integer number (16011044070).

Almost surely, 2^217630443916 is an apocalyptic number.

It is an amenable number.

217630443916 is a deficient number, since it is larger than the sum of its proper divisors (166634613764).

217630443916 is a wasteful number, since it uses less digits than its factorization.

217630443916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51993 (or 51991 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 217630443916 in words is "two hundred seventeen billion, six hundred thirty million, four hundred forty-three thousand, nine hundred sixteen".