12165866136 has 48 divisors (see below), whose sum is σ = 34683394200. Its totient is φ = 3841852032.

The previous prime is 12165866131. The next prime is 12165866143. The reversal of 12165866136 is 63166856121.

12165866136 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 586 + 61 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12165866091 and 12165866100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12165866131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4445221 + ... + 4447956.

Almost surely, 2^12165866136 is an apocalyptic number.

It is an amenable number.

12165866136 is an abundant number, since it is smaller than the sum of its proper divisors (22517528064).

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

12165866136 is a wasteful number, since it uses less digits than its factorization.

12165866136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8893208 (or 8893201 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 12165866136 in words is "twelve billion, one hundred sixty-five million, eight hundred sixty-six thousand, one hundred thirty-six".