16622564 has 18 divisors (see below), whose sum is σ = 33839190. Its totient is φ = 7123872.

The previous prime is 16622563. The next prime is 16622569. The reversal of 16622564 is 46522661.

It can be written as a sum of positive squares in only one way, i.e., 10824100 + 5798464 = 3290^2 + 2408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16622564.

It is not an unprimeable number, because it can be changed into a prime (16622563) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42209 + ... + 42600.

It is an arithmetic number, because the mean of its divisors is an integer number (1879955).

Almost surely, 2^16622564 is an apocalyptic number.

16622564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16622564 is an abundant number, since it is smaller than the sum of its proper divisors (17216626).

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

16622564 is a wasteful number, since it uses less digits than its factorization.

16622564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84827 (or 84818 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 16622564 is about 4077.0778751454. The cubic root of 16622564 is about 255.2109698412.

The spelling of 16622564 in words is "sixteen million, six hundred twenty-two thousand, five hundred sixty-four".