16538703312 has 80 divisors (see below), whose sum is σ = 43217858880. Its totient is φ = 5449445376.

The previous prime is 16538703299. The next prime is 16538703323. The reversal of 16538703312 is 21330783561.

16538703312 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, 5161903 + ... + 5165105.

It is an arithmetic number, because the mean of its divisors is an integer number (540223236).

Almost surely, 2^16538703312 is an apocalyptic number.

16538703312 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 16538703312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21608929440).

16538703312 is an abundant number, since it is smaller than the sum of its proper divisors (26679155568).

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

16538703312 is a wasteful number, since it uses less digits than its factorization.

16538703312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4420 (or 4414 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 16538703312 in words is "sixteen billion, five hundred thirty-eight million, seven hundred three thousand, three hundred twelve".