12185066817 has 96 divisors (see below), whose sum is σ = 22958432640. Its totient is φ = 6316047360.

The previous prime is 12185066809. The next prime is 12185066837. The reversal of 12185066817 is 71866058121.

12185066817 is a `hidden beast` number, since 121 + 8 + 506 + 6 + 8 + 17 = 666.

It is not a de Polignac number, because 12185066817 - 2³ = 12185066809 is a prime.

It is a super-2 number, since 2×12185066817² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12185066837) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12471433 + ... + 12472409.

It is an arithmetic number, because the mean of its divisors is an integer number (239150340).

Almost surely, 2^12185066817 is an apocalyptic number.

It is an amenable number.

12185066817 is a deficient number, since it is larger than the sum of its proper divisors (10773365823).

12185066817 is a wasteful number, since it uses less digits than its factorization.

12185066817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1868 (or 1855 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 12185066817 in words is "twelve billion, one hundred eighty-five million, sixty-six thousand, eight hundred seventeen".