12165305145 has 32 divisors (see below), whose sum is σ = 23553669888. Its totient is φ = 5234147328.

The previous prime is 12165305143. The next prime is 12165305171. The reversal of 12165305145 is 54150356121.

It is not a de Polignac number, because 12165305145 - 2¹ = 12165305143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12165305143) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3405864 + ... + 3409433.

It is an arithmetic number, because the mean of its divisors is an integer number (736052184).

Almost surely, 2^12165305145 is an apocalyptic number.

12165305145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12165305145 is a deficient number, since it is larger than the sum of its proper divisors (11388364743).

12165305145 is a wasteful number, since it uses less digits than its factorization.

12165305145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815329.

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 12165305145 in words is "twelve billion, one hundred sixty-five million, three hundred five thousand, one hundred forty-five".