12165442146 has 48 divisors (see below), whose sum is σ = 30966586560. Its totient is φ = 3402920160.

The previous prime is 12165442057. The next prime is 12165442169. The reversal of 12165442146 is 64124456121.

12165442146 is a `hidden beast` number, since 12 + 1 + 65 + 442 + 146 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 12165442146.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2360566 + ... + 2365713.

It is an arithmetic number, because the mean of its divisors is an integer number (645137220).

Almost surely, 2^12165442146 is an apocalyptic number.

12165442146 is an abundant number, since it is smaller than the sum of its proper divisors (18801144414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12165442146 is a wasteful number, since it uses less digits than its factorization.

12165442146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726311 (or 4726308 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

Adding to 12165442146 its reverse (64124456121), we get a palindrome (76289898267).

The spelling of 12165442146 in words is "twelve billion, one hundred sixty-five million, four hundred forty-two thousand, one hundred forty-six".