921616913684 has 24 divisors (see below), whose sum is σ = 1625722721280. Its totient is φ = 457125572736.

The previous prime is 921616913677. The next prime is 921616913729. The reversal of 921616913684 is 486319616129.

It is a congruent number.

It is an unprimeable number.

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, 4339772 + ... + 4547180.

It is an arithmetic number, because the mean of its divisors is an integer number (67738446720).

Almost surely, 2^921616913684 is an apocalyptic number.

It is an amenable number.

921616913684 is a deficient number, since it is larger than the sum of its proper divisors (704105807596).

921616913684 is a wasteful number, since it uses less digits than its factorization.

921616913684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216287 (or 216285 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 56.

The spelling of 921616913684 in words is "nine hundred twenty-one billion, six hundred sixteen million, nine hundred thirteen thousand, six hundred eighty-four".