16539049728 has 216 divisors, whose sum is σ = 49382148816. Its totient is φ = 5319475200.

The previous prime is 16539049727. The next prime is 16539049733. The reversal of 16539049728 is 82794093561.

16539049728 is a `hidden beast` number, since 1 + 65 + 3 + 90 + 497 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539049727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11166748 + ... + 11168228.

It is a 1-persistent number, because it is pandigital, but 2⋅16539049728 = 33078099456 is not.

Almost surely, 2^16539049728 is an apocalyptic number.

16539049728 is a gapful number since it is divisible by the number (18) 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 16539049728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24691074408).

16539049728 is an abundant number, since it is smaller than the sum of its proper divisors (32843099088).

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

16539049728 is a wasteful number, since it uses less digits than its factorization.

16539049728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671 (or 1654 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 16539049728 in words is "sixteen billion, five hundred thirty-nine million, forty-nine thousand, seven hundred twenty-eight".