16563120 has 80 divisors (see below), whose sum is σ = 58686720. Its totient is φ = 3785472.

The previous prime is 16563109. The next prime is 16563133. The reversal of 16563120 is 2136561.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3250 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (733584).

Almost surely, 2^16563120 is an apocalyptic number.

16563120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16563120 is an abundant number, since it is smaller than the sum of its proper divisors (42123600).

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

16563120 is a wasteful number, since it uses less digits than its factorization.

16563120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9882 (or 9876 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 16563120 is about 4069.7813209066. The cubic root of 16563120 is about 254.9063862449.

Adding to 16563120 its reverse (2136561), we get a palindrome (18699681).

The spelling of 16563120 in words is "sixteen million, five hundred sixty-three thousand, one hundred twenty".