16517447980 has 96 divisors (see below), whose sum is σ = 38674944000. Its totient is φ = 5875234560.

The previous prime is 16517447941. The next prime is 16517448001. The reversal of 16517447980 is 8974471561.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1890061 + ... + 1898779.

It is an arithmetic number, because the mean of its divisors is an integer number (402864000).

Almost surely, 2^16517447980 is an apocalyptic number.

16517447980 is a gapful number since it is divisible by the number (10) 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 16517447980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19337472000).

16517447980 is an abundant number, since it is smaller than the sum of its proper divisors (22157496020).

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

16517447980 is a wasteful number, since it uses less digits than its factorization.

16517447980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927 (or 8925 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 16517447980 in words is "sixteen billion, five hundred seventeen million, four hundred forty-seven thousand, nine hundred eighty".