188985545 has 16 divisors (see below), whose sum is σ = 264072960. Its totient is φ = 127143744.

The previous prime is 188985509. The next prime is 188985553. The reversal of 188985545 is 545589881.

It is a happy number.

It is not a de Polignac number, because 188985545 - 2⁸ = 188985289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 49085 + ... + 52794.

It is an arithmetic number, because the mean of its divisors is an integer number (16504560).

Almost surely, 2^188985545 is an apocalyptic number.

It is an amenable number.

188985545 is a deficient number, since it is larger than the sum of its proper divisors (75087415).

188985545 is a wasteful number, since it uses less digits than its factorization.

188985545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101944.

The product of its digits is 2304000, while the sum is 53.

The square root of 188985545 is about 13747.2013515479. The cubic root of 188985545 is about 573.8647240776.

The spelling of 188985545 in words is "one hundred eighty-eight million, nine hundred eighty-five thousand, five hundred forty-five".