1560556110161 has 2 divisors, whose sum is σ = 1560556110162. Its totient is φ = 1560556110160.

The previous prime is 1560556110143. The next prime is 1560556110163. The reversal of 1560556110161 is 1610116550651.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527557571136 + 32998539025 = 1235944^2 + 181655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1560556110161 - 2³⁴ = 1543376240977 is a prime.

It is a Sophie Germain prime.

Together with 1560556110163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1560556110163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780278055080 + 780278055081.

It is an arithmetic number, because the mean of its divisors is an integer number (780278055081).

Almost surely, 2^{1560556110161} is an apocalyptic number.

It is an amenable number.

1560556110161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1560556110161 is an equidigital number, since it uses as much as digits as its factorization.

1560556110161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 38.

The spelling of 1560556110161 in words is "one trillion, five hundred sixty billion, five hundred fifty-six million, one hundred ten thousand, one hundred sixty-one".