16005516661116 has 144 divisors (see below), whose sum is σ = 41148670932096. Its totient is φ = 5244645998592.

The previous prime is 16005516661111. The next prime is 16005516661129. The reversal of 16005516661116 is 61116661550061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16005516661111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3546533676 + ... + 3546538188.

Almost surely, 2^{16005516661116} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16005516661116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20574335466048).

16005516661116 is an abundant number, since it is smaller than the sum of its proper divisors (25143154270980).

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

16005516661116 is a wasteful number, since it uses less digits than its factorization.

16005516661116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772 (or 8767 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 16005516661116 in words is "sixteen trillion, five billion, five hundred sixteen million, six hundred sixty-one thousand, one hundred sixteen".