188485565 has 8 divisors (see below), whose sum is σ = 227624280. Its totient is φ = 149827392.

The previous prime is 188485553. The next prime is 188485573. The reversal of 188485565 is 565584881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60388441 + 128097124 = 7771^2 + 11318^2 .

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 188485565 - 2⁶ = 188485501 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119270 + ... + 120839.

It is an arithmetic number, because the mean of its divisors is an integer number (28453035).

Almost surely, 2^188485565 is an apocalyptic number.

It is an amenable number.

188485565 is a deficient number, since it is larger than the sum of its proper divisors (39138715).

188485565 is a wasteful number, since it uses less digits than its factorization.

188485565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240271.

The product of its digits is 1536000, while the sum is 50.

The square root of 188485565 is about 13729.0045159873. The cubic root of 188485565 is about 573.3582051211.

The spelling of 188485565 in words is "one hundred eighty-eight million, four hundred eighty-five thousand, five hundred sixty-five".