16645537480 has 256 divisors, whose sum is σ = 46797004800. Its totient is φ = 5238328320.

The previous prime is 16645537439. The next prime is 16645537481. The reversal of 16645537480 is 8473554661.

16645537480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16645537481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11193297 + ... + 11194783.

It is an arithmetic number, because the mean of its divisors is an integer number (182800800).

Almost surely, 2^16645537480 is an apocalyptic number.

16645537480 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 16645537480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23398502400).

16645537480 is an abundant number, since it is smaller than the sum of its proper divisors (30151467320).

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

16645537480 is a wasteful number, since it uses less digits than its factorization.

16645537480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1640 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 16645537480 in words is "sixteen billion, six hundred forty-five million, five hundred thirty-seven thousand, four hundred eighty".