12634527161 has 2 divisors, whose sum is σ = 12634527162. Its totient is φ = 12634527160.

The previous prime is 12634527133. The next prime is 12634527167. The reversal of 12634527161 is 16172543621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12489180025 + 145347136 = 111755^2 + 12056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12634527161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12634527167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6317263580 + 6317263581.

It is an arithmetic number, because the mean of its divisors is an integer number (6317263581).

Almost surely, 2^12634527161 is an apocalyptic number.

It is an amenable number.

12634527161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12634527161 is an equidigital number, since it uses as much as digits as its factorization.

12634527161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The spelling of 12634527161 in words is "twelve billion, six hundred thirty-four million, five hundred twenty-seven thousand, one hundred sixty-one".