161060561 has 2 divisors, whose sum is σ = 161060562. Its totient is φ = 161060560.

The previous prime is 161060521. The next prime is 161060591. The reversal of 161060561 is 165060161.

161060561 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., 133171600 + 27888961 = 11540^2 + 5281^2 .

It is a cyclic number.

It is not a de Polignac number, because 161060561 - 2²² = 156866257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161060561.

It is not a weakly prime, because it can be changed into another prime (161060521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80530280 + 80530281.

It is an arithmetic number, because the mean of its divisors is an integer number (80530281).

Almost surely, 2^161060561 is an apocalyptic number.

It is an amenable number.

161060561 is a deficient number, since it is larger than the sum of its proper divisors (1).

161060561 is an equidigital number, since it uses as much as digits as its factorization.

161060561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 161060561 is about 12690.9637537895. The cubic root of 161060561 is about 544.0803850088.

The spelling of 161060561 in words is "one hundred sixty-one million, sixty thousand, five hundred sixty-one".