16560648 has 72 divisors (see below), whose sum is σ = 48602970. Its totient is φ = 5091840.

The previous prime is 16560641. The next prime is 16560683. The reversal of 16560648 is 84606561.

16560648 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 0 + 648 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5391684 + 11168964 = 2322^2 + 3342^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (16560641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11488 + ... + 12848.

Almost surely, 2^16560648 is an apocalyptic number.

16560648 is a gapful number since it is divisible by the number (18) 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 16560648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24301485).

16560648 is an abundant number, since it is smaller than the sum of its proper divisors (32042322).

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

16560648 is a wasteful number, since it uses less digits than its factorization.

16560648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 16560648 is about 4069.4776077526. The cubic root of 16560648 is about 254.8937042554.

The spelling of 16560648 in words is "sixteen million, five hundred sixty thousand, six hundred forty-eight".