16545720216448 has 128 divisors (see below), whose sum is σ = 34676499686400. Its totient is φ = 7853394063360.

The previous prime is 16545720216439. The next prime is 16545720216449. The reversal of 16545720216448 is 84461202754561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545720216449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109254636 + ... + 109405972.

It is an arithmetic number, because the mean of its divisors is an integer number (270910153800).

Almost surely, 2^{16545720216448} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16545720216448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17338249843200).

16545720216448 is an abundant number, since it is smaller than the sum of its proper divisors (18130779469952).

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

16545720216448 is a wasteful number, since it uses less digits than its factorization.

16545720216448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151908 (or 151896 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 16545720216448 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, two hundred sixteen thousand, four hundred forty-eight".