12185890456 has 16 divisors (see below), whose sum is σ = 23223111840. Its totient is φ = 5993060640.

The previous prime is 12185890441. The next prime is 12185890459. The reversal of 12185890456 is 65409858121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185890459) 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 3 ways as a sum of consecutive naturals, for example, 12485056 + ... + 12486031.

It is an arithmetic number, because the mean of its divisors is an integer number (1451444490).

Almost surely, 2^12185890456 is an apocalyptic number.

It is an amenable number.

12185890456 is a deficient number, since it is larger than the sum of its proper divisors (11037221384).

12185890456 is a wasteful number, since it uses less digits than its factorization.

12185890456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24971154 (or 24971150 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 12185890456 in words is "twelve billion, one hundred eighty-five million, eight hundred ninety thousand, four hundred fifty-six".