12646611437 has 2 divisors, whose sum is σ = 12646611438. Its totient is φ = 12646611436.

The previous prime is 12646611403. The next prime is 12646611443. The reversal of 12646611437 is 73411664621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7140081001 + 5506530436 = 84499^2 + 74206^2 .

It is a cyclic number.

It is not a de Polignac number, because 12646611437 - 2⁸ = 12646611181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12646611394 and 12646611403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12646611037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323305718 + 6323305719.

It is an arithmetic number, because the mean of its divisors is an integer number (6323305719).

Almost surely, 2^12646611437 is an apocalyptic number.

It is an amenable number.

12646611437 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646611437 is an equidigital number, since it uses as much as digits as its factorization.

12646611437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The spelling of 12646611437 in words is "twelve billion, six hundred forty-six million, six hundred eleven thousand, four hundred thirty-seven".