12756123637 has 2 divisors, whose sum is σ = 12756123638. Its totient is φ = 12756123636.

The previous prime is 12756123617. The next prime is 12756123707. The reversal of 12756123637 is 73632165721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12732639921 + 23483716 = 112839^2 + 4846^2 .

It is a cyclic number.

It is not a de Polignac number, because 12756123637 - 2¹¹ = 12756121589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12756123593 and 12756123602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12756123617) 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, 6378061818 + 6378061819.

It is an arithmetic number, because the mean of its divisors is an integer number (6378061819).

Almost surely, 2^12756123637 is an apocalyptic number.

It is an amenable number.

12756123637 is a deficient number, since it is larger than the sum of its proper divisors (1).

12756123637 is an equidigital number, since it uses as much as digits as its factorization.

12756123637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 43.

The spelling of 12756123637 in words is "twelve billion, seven hundred fifty-six million, one hundred twenty-three thousand, six hundred thirty-seven".