61606655161 has 2 divisors, whose sum is σ = 61606655162. Its totient is φ = 61606655160.

The previous prime is 61606655141. The next prime is 61606655177. The reversal of 61606655161 is 16155660616.

61606655161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60277615225 + 1329039936 = 245515^2 + 36456^2 .

It is a cyclic number.

It is not a de Polignac number, because 61606655161 - 2³⁵ = 27246916793 is a prime.

It is not a weakly prime, because it can be changed into another prime (61606655101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803327580 + 30803327581.

It is an arithmetic number, because the mean of its divisors is an integer number (30803327581).

Almost surely, 2^61606655161 is an apocalyptic number.

It is an amenable number.

61606655161 is a deficient number, since it is larger than the sum of its proper divisors (1).

61606655161 is an equidigital number, since it uses as much as digits as its factorization.

61606655161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 61606655161 in words is "sixty-one billion, six hundred six million, six hundred fifty-five thousand, one hundred sixty-one".