165568005961 has 2 divisors, whose sum is σ = 165568005962. Its totient is φ = 165568005960.

The previous prime is 165568005947. The next prime is 165568005983. The reversal of 165568005961 is 169500865561.

165568005961 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., 158026125625 + 7541880336 = 397525^2 + 86844^2 .

It is a cyclic number.

It is not a de Polignac number, because 165568005961 - 2⁵ = 165568005929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165568005899 and 165568005908.

It is not a weakly prime, because it can be changed into another prime (165568005901) 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, 82784002980 + 82784002981.

It is an arithmetic number, because the mean of its divisors is an integer number (82784002981).

Almost surely, 2^165568005961 is an apocalyptic number.

It is an amenable number.

165568005961 is a deficient number, since it is larger than the sum of its proper divisors (1).

165568005961 is an equidigital number, since it uses as much as digits as its factorization.

165568005961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 165568005961 in words is "one hundred sixty-five billion, five hundred sixty-eight million, five thousand, nine hundred sixty-one".