56563644637477 has 2 divisors, whose sum is σ = 56563644637478. Its totient is φ = 56563644637476.

The previous prime is 56563644637429. The next prime is 56563644637499. The reversal of 56563644637477 is 77473644636565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56383188747876 + 180455889601 = 7508874^2 + 424801^2 .

It is a cyclic number.

It is not a de Polignac number, because 56563644637477 - 2²³ = 56563636248869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56563644637277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28281822318738 + 28281822318739.

It is an arithmetic number, because the mean of its divisors is an integer number (28281822318739).

Almost surely, 2^{56563644637477} is an apocalyptic number.

It is an amenable number.

56563644637477 is a deficient number, since it is larger than the sum of its proper divisors (1).

56563644637477 is an equidigital number, since it uses as much as digits as its factorization.

56563644637477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6401203200, while the sum is 73.

The spelling of 56563644637477 in words is "fifty-six trillion, five hundred sixty-three billion, six hundred forty-four million, six hundred thirty-seven thousand, four hundred seventy-seven".