12651628544557 has 2 divisors, whose sum is σ = 12651628544558. Its totient is φ = 12651628544556.

The previous prime is 12651628544539. The next prime is 12651628544573. The reversal of 12651628544557 is 75544582615621.

12651628544557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9372990433156 + 3278638111401 = 3061534^2 + 1810701^2 .

It is a cyclic number.

It is not a de Polignac number, because 12651628544557 - 2³⁹ = 12101872730669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12651628544495 and 12651628544504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12651628544587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325814272278 + 6325814272279.

It is an arithmetic number, because the mean of its divisors is an integer number (6325814272279).

Almost surely, 2^{12651628544557} is an apocalyptic number.

It is an amenable number.

12651628544557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651628544557 is an equidigital number, since it uses as much as digits as its factorization.

12651628544557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640000, while the sum is 61.

The spelling of 12651628544557 in words is "twelve trillion, six hundred fifty-one billion, six hundred twenty-eight million, five hundred forty-four thousand, five hundred fifty-seven".