16560438660 has 120 divisors (see below), whose sum is σ = 51994958400. Its totient is φ = 4412356416.

The previous prime is 16560438641. The next prime is 16560438737. The reversal of 16560438660 is 6683406561.

16560438660 is a `hidden beast` number, since 1 + 6 + 5 + 604 + 38 + 6 + 6 + 0 = 666.

16560438660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16560438660² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39 ways as a sum of consecutive naturals, for example, 2262727 + ... + 2270033.

It is an arithmetic number, because the mean of its divisors is an integer number (433291320).

Almost surely, 2^16560438660 is an apocalyptic number.

16560438660 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 16560438660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25997479200).

16560438660 is an abundant number, since it is smaller than the sum of its proper divisors (35434519740).

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

16560438660 is a wasteful number, since it uses less digits than its factorization.

16560438660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727 (or 8716 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 16560438660 in words is "sixteen billion, five hundred sixty million, four hundred thirty-eight thousand, six hundred sixty".