16501680384 has 144 divisors (see below), whose sum is σ = 50663467008. Its totient is φ = 4670539776.

The previous prime is 16501680373. The next prime is 16501680397. The reversal of 16501680384 is 48308610561.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560889 + ... + 589575.

It is an arithmetic number, because the mean of its divisors is an integer number (351829632).

Almost surely, 2^16501680384 is an apocalyptic number.

16501680384 is a gapful number since it is divisible by the number (14) 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 16501680384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25331733504).

16501680384 is an abundant number, since it is smaller than the sum of its proper divisors (34161786624).

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

16501680384 is a wasteful number, since it uses less digits than its factorization.

16501680384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28820 (or 28806 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 16501680384 in words is "sixteen billion, five hundred one million, six hundred eighty thousand, three hundred eighty-four".