189564565 has 8 divisors (see below), whose sum is σ = 228113280. Its totient is φ = 151227792.

The previous prime is 189564563. The next prime is 189564587. The reversal of 189564565 is 565465981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189564565 - 2¹ = 189564563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189564563) 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 7 ways as a sum of consecutive naturals, for example, 51009 + ... + 54598.

It is an arithmetic number, because the mean of its divisors is an integer number (28514160).

Almost surely, 2^189564565 is an apocalyptic number.

It is an amenable number.

189564565 is a deficient number, since it is larger than the sum of its proper divisors (38548715).

189564565 is a wasteful number, since it uses less digits than its factorization.

189564565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105971.

The product of its digits is 1296000, while the sum is 49.

The square root of 189564565 is about 13768.2448046220. The cubic root of 189564565 is about 574.4502016244.

The spelling of 189564565 in words is "one hundred eighty-nine million, five hundred sixty-four thousand, five hundred sixty-five".