16545327820704 has 144 divisors (see below), whose sum is σ = 47762877052800. Its totient is φ = 5431981022208.

The previous prime is 16545327820699. The next prime is 16545327820789. The reversal of 16545327820704 is 40702872354561.

16545327820704 is a `hidden beast` number, since 1 + 6 + 545 + 3 + 2 + 7 + 8 + 20 + 70 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

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, 8416567 + ... + 10194569.

It is an arithmetic number, because the mean of its divisors is an integer number (331686646200).

Almost surely, 2^{16545327820704} 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 16545327820704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23881438526400).

16545327820704 is an abundant number, since it is smaller than the sum of its proper divisors (31217549232096).

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

16545327820704 is a wasteful number, since it uses less digits than its factorization.

16545327820704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778507 (or 1778496 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 54.

The spelling of 16545327820704 in words is "sixteen trillion, five hundred forty-five billion, three hundred twenty-seven million, eight hundred twenty thousand, seven hundred four".