16501680905112 has 128 divisors (see below), whose sum is σ = 49374099768000. Its totient is φ = 5076401725440.

The previous prime is 16501680905111. The next prime is 16501680905141. The reversal of 16501680905112 is 21150908610561.

16501680905112 is a `hidden beast` number, since 1 + 6 + 50 + 1 + 6 + 80 + 9 + 0 + 511 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16501680905111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13185912 + ... + 14383032.

Almost surely, 2^{16501680905112} is an apocalyptic number.

16501680905112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16501680905112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24687049884000).

16501680905112 is an abundant number, since it is smaller than the sum of its proper divisors (32872418862888).

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

16501680905112 is a wasteful number, since it uses less digits than its factorization.

16501680905112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202058 (or 1202048 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The spelling of 16501680905112 in words is "sixteen trillion, five hundred one billion, six hundred eighty million, nine hundred five thousand, one hundred twelve".