56663000161 has 2 divisors, whose sum is σ = 56663000162. Its totient is φ = 56663000160.

The previous prime is 56663000129. The next prime is 56663000171. The reversal of 56663000161 is 16100036665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45387745936 + 11275254225 = 213044^2 + 106185^2 .

It is a cyclic number.

It is not a de Polignac number, because 56663000161 - 2⁵ = 56663000129 is a prime.

It is not a weakly prime, because it can be changed into another prime (56663000171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28331500080 + 28331500081.

It is an arithmetic number, because the mean of its divisors is an integer number (28331500081).

Almost surely, 2^56663000161 is an apocalyptic number.

It is an amenable number.

56663000161 is a deficient number, since it is larger than the sum of its proper divisors (1).

56663000161 is an equidigital number, since it uses as much as digits as its factorization.

56663000161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 56663000161 in words is "fifty-six billion, six hundred sixty-three million, one hundred sixty-one", and thus it is an aban number.