16560815040000 has 4800 divisors, whose sum is σ = 80521152983040. Its totient is φ = 3284582400000.

The previous prime is 16560815039947. The next prime is 16560815040019. The reversal of 16560815040000 is 4051806561.

16560815040000 is a `hidden beast` number, since 1 + 6 + 5 + 608 + 1 + 5 + 0 + 40 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (4800).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 226860479964 + ... + 226860480036.

Almost surely, 2^{16560815040000} is an apocalyptic number.

16560815040000 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 16560815040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40260576491520).

16560815040000 is an abundant number, since it is smaller than the sum of its proper divisors (63960337943040).

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

16560815040000 is an equidigital number, since it uses as much as digits as its factorization.

16560815040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

Adding to 16560815040000 its reverse (4051806561), we get a palindrome (16564866846561).

The spelling of 16560815040000 in words is "sixteen trillion, five hundred sixty billion, eight hundred fifteen million, forty thousand".