16539765440 has 112 divisors (see below), whose sum is σ = 43010413344. Its totient is φ = 6008217600.

The previous prime is 16539765439. The next prime is 16539765461. The reversal of 16539765440 is 4456793561.

16539765440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4648142 + ... + 4651698.

Almost surely, 2^16539765440 is an apocalyptic number.

16539765440 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 16539765440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21505206672).

16539765440 is an abundant number, since it is smaller than the sum of its proper divisors (26470647904).

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

16539765440 is a wasteful number, since it uses less digits than its factorization.

16539765440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906 (or 4896 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 16539765440 in words is "sixteen billion, five hundred thirty-nine million, seven hundred sixty-five thousand, four hundred forty".