9138272185 has 16 divisors (see below), whose sum is σ = 12553865856. Its totient is φ = 6255554688.

The previous prime is 9138272153. The next prime is 9138272219. The reversal of 9138272185 is 5812728319.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9138272185 - 2⁵ = 9138272153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201852 + ... + 242941.

It is an arithmetic number, because the mean of its divisors is an integer number (784616616).

Almost surely, 2^9138272185 is an apocalyptic number.

It is an amenable number.

9138272185 is a deficient number, since it is larger than the sum of its proper divisors (3415593671).

9138272185 is a wasteful number, since it uses less digits than its factorization.

9138272185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445392.

The product of its digits is 241920, while the sum is 46.

The square root of 9138272185 is about 95594.3104216982. The cubic root of 9138272185 is about 2090.6822391360.

The spelling of 9138272185 in words is "nine billion, one hundred thirty-eight million, two hundred seventy-two thousand, one hundred eighty-five".