56566556155061 has 2 divisors, whose sum is σ = 56566556155062. Its totient is φ = 56566556155060.

The previous prime is 56566556155051. The next prime is 56566556155091. The reversal of 56566556155061 is 16055165566565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54155337258961 + 2411218896100 = 7359031^2 + 1552810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56566556155061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56566556154985 and 56566556155003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56566556155051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28283278077530 + 28283278077531.

It is an arithmetic number, because the mean of its divisors is an integer number (28283278077531).

Almost surely, 2^{56566556155061} is an apocalyptic number.

It is an amenable number.

56566556155061 is a deficient number, since it is larger than the sum of its proper divisors (1).

56566556155061 is an equidigital number, since it uses as much as digits as its factorization.

56566556155061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500000, while the sum is 62.

The spelling of 56566556155061 in words is "fifty-six trillion, five hundred sixty-six billion, five hundred fifty-six million, one hundred fifty-five thousand, sixty-one".