16565652 has 18 divisors (see below), whose sum is σ = 41874378. Its totient is φ = 5521872.

The previous prime is 16565651. The next prime is 16565669. The reversal of 16565652 is 25656561.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14243076 + 2322576 = 3774^2 + 1524^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 460157 = 16565652 / (1 + 6 + 5 + 6 + 5 + 6 + 5 + 2).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16565651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230043 + ... + 230114.

Almost surely, 2^16565652 is an apocalyptic number.

16565652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16565652 is an abundant number, since it is smaller than the sum of its proper divisors (25308726).

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

16565652 is a wasteful number, since it uses less digits than its factorization.

16565652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460167 (or 460162 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 16565652 is about 4070.0923822439. The cubic root of 16565652 is about 254.9193747415.

Subtracting 16565652 from its reverse (25656561), we obtain a palindrome (9090909).

The spelling of 16565652 in words is "sixteen million, five hundred sixty-five thousand, six hundred fifty-two".