12185365473 has 6 divisors (see below), whose sum is σ = 17601083474. Its totient is φ = 8123576976.

The previous prime is 12185365471. The next prime is 12185365529. The reversal of 12185365473 is 37456358121.

It is a happy number.

12185365473 is a `hidden beast` number, since 1 + 21 + 85 + 3 + 6 + 547 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8998988769 + 3186376704 = 94863^2 + 56448^2 .

It is not a de Polignac number, because 12185365473 - 2¹ = 12185365471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12185365471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676964740 + ... + 676964757.

Almost surely, 2^12185365473 is an apocalyptic number.

It is an amenable number.

12185365473 is a deficient number, since it is larger than the sum of its proper divisors (5415718001).

12185365473 is a wasteful number, since it uses less digits than its factorization.

12185365473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353929503 (or 1353929500 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 12185365473 in words is "twelve billion, one hundred eighty-five million, three hundred sixty-five thousand, four hundred seventy-three".