12427136065 has 4 divisors (see below), whose sum is σ = 14912563284. Its totient is φ = 9941708848.

The previous prime is 12427136063. The next prime is 12427136069. The reversal of 12427136065 is 56063172421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56063172421 = 174917 ⋅320513.

It can be written as a sum of positive squares in 2 ways, for example, as 1422496656 + 11004639409 = 37716^2 + 104903^2 .

It is a cyclic number.

It is not a de Polignac number, because 12427136065 - 2¹ = 12427136063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12427136063) 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, 1242713602 + ... + 1242713611.

It is an arithmetic number, because the mean of its divisors is an integer number (3728140821).

Almost surely, 2^12427136065 is an apocalyptic number.

It is an amenable number.

12427136065 is a deficient number, since it is larger than the sum of its proper divisors (2485427219).

12427136065 is an equidigital number, since it uses as much as digits as its factorization.

12427136065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485427218.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 12427136065 in words is "twelve billion, four hundred twenty-seven million, one hundred thirty-six thousand, sixty-five".