16554564 has 72 divisors (see below), whose sum is σ = 46525920. Its totient is φ = 5088096.

The previous prime is 16554557. The next prime is 16554569. The reversal of 16554564 is 46545561.

16554564 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 (16554569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17799 + ... + 18705.

Almost surely, 2^16554564 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 16554564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23262960).

16554564 is an abundant number, since it is smaller than the sum of its proper divisors (29971356).

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

16554564 is a wasteful number, since it uses less digits than its factorization.

16554564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 925 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 16554564 is about 4068.7300229924. The cubic root of 16554564 is about 254.8624864102.

The spelling of 16554564 in words is "sixteen million, five hundred fifty-four thousand, five hundred sixty-four".