12272545361 has 4 divisors (see below), whose sum is σ = 12994459812. Its totient is φ = 11550630912.

The previous prime is 12272545357. The next prime is 12272545393. The reversal of 12272545361 is 16354527221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16354527221 = 17 ⋅962031013.

It can be written as a sum of positive squares in 2 ways, for example, as 5179536961 + 7093008400 = 71969^2 + 84220^2 .

It is a cyclic number.

It is not a de Polignac number, because 12272545361 - 2² = 12272545357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12272545301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360957200 + ... + 360957233.

It is an arithmetic number, because the mean of its divisors is an integer number (3248614953).

Almost surely, 2^12272545361 is an apocalyptic number.

It is an amenable number.

12272545361 is a deficient number, since it is larger than the sum of its proper divisors (721914451).

12272545361 is an equidigital number, since it uses as much as digits as its factorization.

12272545361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721914450.

The product of its digits is 100800, while the sum is 38.

The spelling of 12272545361 in words is "twelve billion, two hundred seventy-two million, five hundred forty-five thousand, three hundred sixty-one".