216116171516 has 24 divisors (see below), whose sum is σ = 433321111776. Its totient is φ = 92387908800.

The previous prime is 216116171443. The next prime is 216116171521. The reversal of 216116171516 is 615171611612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 216116171516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9709835 + ... + 9732066.

It is an arithmetic number, because the mean of its divisors is an integer number (18055046324).

Almost surely, 2^216116171516 is an apocalyptic number.

It is an amenable number.

216116171516 is an abundant number, since it is smaller than the sum of its proper divisors (217204940260).

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

216116171516 is a wasteful number, since it uses less digits than its factorization.

216116171516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19442309 (or 19442307 counting only the distinct ones).

The product of its digits is 15120, while the sum is 38.

The spelling of 216116171516 in words is "two hundred sixteen billion, one hundred sixteen million, one hundred seventy-one thousand, five hundred sixteen".