165310609185 has 32 divisors (see below), whose sum is σ = 296486311680. Its totient is φ = 87385423104.

The previous prime is 165310609181. The next prime is 165310609187. The reversal of 165310609185 is 581906013561.

165310609185 is a `hidden beast` number, since 1 + 6 + 5 + 31 + 0 + 609 + 1 + 8 + 5 = 666.

It is not a de Polignac number, because 165310609185 - 2² = 165310609181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 165310609185.

It is not an unprimeable number, because it can be changed into a prime (165310609181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5402989 + ... + 5433498.

It is an arithmetic number, because the mean of its divisors is an integer number (9265197240).

Almost surely, 2^165310609185 is an apocalyptic number.

165310609185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165310609185 is a deficient number, since it is larger than the sum of its proper divisors (131175702495).

165310609185 is a wasteful number, since it uses less digits than its factorization.

165310609185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10836614 (or 10836608 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 165310609185 in words is "one hundred sixty-five billion, three hundred ten million, six hundred nine thousand, one hundred eighty-five".