188870085865 has 16 divisors (see below), whose sum is σ = 246268638720. Its totient is φ = 138526104960.

The previous prime is 188870085841. The next prime is 188870085869. The reversal of 188870085865 is 568580078881.

It is not a de Polignac number, because 188870085865 - 2⁹ = 188870085353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 188870085797 and 188870085806.

It is not an unprimeable number, because it can be changed into a prime (188870085869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32063284 + ... + 32069173.

It is an arithmetic number, because the mean of its divisors is an integer number (15391789920).

Almost surely, 2^188870085865 is an apocalyptic number.

It is an amenable number.

188870085865 is a deficient number, since it is larger than the sum of its proper divisors (57398552855).

188870085865 is a wasteful number, since it uses less digits than its factorization.

188870085865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64132512.

The product of its (nonzero) digits is 34406400, while the sum is 64.

The spelling of 188870085865 in words is "one hundred eighty-eight billion, eight hundred seventy million, eighty-five thousand, eight hundred sixty-five".