56554860161 has 2 divisors, whose sum is σ = 56554860162. Its totient is φ = 56554860160.

The previous prime is 56554860079. The next prime is 56554860169. The reversal of 56554860161 is 16106845565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45462768400 + 11092091761 = 213220^2 + 105319^2 .

It is a cyclic number.

It is not a de Polignac number, because 56554860161 - 2³⁰ = 55481118337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (56554860169) 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, 28277430080 + 28277430081.

It is an arithmetic number, because the mean of its divisors is an integer number (28277430081).

Almost surely, 2^56554860161 is an apocalyptic number.

It is an amenable number.

56554860161 is a deficient number, since it is larger than the sum of its proper divisors (1).

56554860161 is an equidigital number, since it uses as much as digits as its factorization.

56554860161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 56554860161 in words is "fifty-six billion, five hundred fifty-four million, eight hundred sixty thousand, one hundred sixty-one".