61068163081 has 2 divisors, whose sum is σ = 61068163082. Its totient is φ = 61068163080.

The previous prime is 61068163073. The next prime is 61068163111. The reversal of 61068163081 is 18036186016.

61068163081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36122803600 + 24945359481 = 190060^2 + 157941^2 .

It is a cyclic number.

It is not a de Polignac number, because 61068163081 - 2³ = 61068163073 is a prime.

It is a super-2 number, since 2×61068163081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61068163021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30534081540 + 30534081541.

It is an arithmetic number, because the mean of its divisors is an integer number (30534081541).

Almost surely, 2^61068163081 is an apocalyptic number.

It is an amenable number.

61068163081 is a deficient number, since it is larger than the sum of its proper divisors (1).

61068163081 is an equidigital number, since it uses as much as digits as its factorization.

61068163081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 61068163081 in words is "sixty-one billion, sixty-eight million, one hundred sixty-three thousand, eighty-one".