16545717745920 has 432 divisors, whose sum is σ = 64763685185472. Its totient is φ = 4011082260480.

The previous prime is 16545717745859. The next prime is 16545717745943. The reversal of 16545717745920 is 2954771754561.

16545717745920 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 5 + 7 + 177 + 459 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1003494 + ... + 5839386.

Almost surely, 2^{16545717745920} is an apocalyptic number.

16545717745920 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 16545717745920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32381842592736).

16545717745920 is an abundant number, since it is smaller than the sum of its proper divisors (48217967439552).

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

16545717745920 is an equidigital number, since it uses as much as digits as its factorization.

16545717745920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4835940 (or 4835914 counting only the distinct ones).

The product of its (nonzero) digits is 74088000, while the sum is 63.

The spelling of 16545717745920 in words is "sixteen trillion, five hundred forty-five billion, seven hundred seventeen million, seven hundred forty-five thousand, nine hundred twenty".