161225142163 has 2 divisors, whose sum is σ = 161225142164. Its totient is φ = 161225142162.

The previous prime is 161225142157. The next prime is 161225142179. The reversal of 161225142163 is 361241522161.

161225142163 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161225142163 is a prime.

It is not a weakly prime, because it can be changed into another prime (161225142563) 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, 80612571081 + 80612571082.

It is an arithmetic number, because the mean of its divisors is an integer number (80612571082).

Almost surely, 2^161225142163 is an apocalyptic number.

161225142163 is a deficient number, since it is larger than the sum of its proper divisors (1).

161225142163 is an equidigital number, since it uses as much as digits as its factorization.

161225142163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The spelling of 161225142163 in words is "one hundred sixty-one billion, two hundred twenty-five million, one hundred forty-two thousand, one hundred sixty-three".