16644696920 has 64 divisors (see below), whose sum is σ = 39467692800. Its totient is φ = 6300097920.

The previous prime is 16644696899. The next prime is 16644696949. The reversal of 16644696920 is 2969644661.

16644696920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 661775 + ... + 686465.

It is an arithmetic number, because the mean of its divisors is an integer number (616682700).

Almost surely, 2^16644696920 is an apocalyptic number.

16644696920 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 16644696920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19733846400).

16644696920 is an abundant number, since it is smaller than the sum of its proper divisors (22822995880).

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

16644696920 is a wasteful number, since it uses less digits than its factorization.

16644696920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25608 (or 25604 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 16644696920 in words is "sixteen billion, six hundred forty-four million, six hundred ninety-six thousand, nine hundred twenty".