56567656771 has 2 divisors, whose sum is σ = 56567656772. Its totient is φ = 56567656770.

The previous prime is 56567656741. The next prime is 56567656799. The reversal of 56567656771 is 17765676565.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56567656771 is a prime.

It is not a weakly prime, because it can be changed into another prime (56567656741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283828385 + 28283828386.

It is an arithmetic number, because the mean of its divisors is an integer number (28283828386).

Almost surely, 2^56567656771 is an apocalyptic number.

56567656771 is a deficient number, since it is larger than the sum of its proper divisors (1).

56567656771 is an equidigital number, since it uses as much as digits as its factorization.

56567656771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566000, while the sum is 61.

The spelling of 56567656771 in words is "fifty-six billion, five hundred sixty-seven million, six hundred fifty-six thousand, seven hundred seventy-one".