16217280912 has 160 divisors (see below), whose sum is σ = 48914012160. Its totient is φ = 4534133760.

The previous prime is 16217280899. The next prime is 16217280913. The reversal of 16217280912 is 21908271261.

It is not an unprimeable number, because it can be changed into a prime (16217280913) 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, 4617237 + ... + 4620747.

It is an arithmetic number, because the mean of its divisors is an integer number (305712576).

Almost surely, 2^16217280912 is an apocalyptic number.

16217280912 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 16217280912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24457006080).

16217280912 is an abundant number, since it is smaller than the sum of its proper divisors (32696731248).

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

16217280912 is a wasteful number, since it uses less digits than its factorization.

16217280912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3815 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 16217280912 in words is "sixteen billion, two hundred seventeen million, two hundred eighty thousand, nine hundred twelve".