42560661153161 has 2 divisors, whose sum is σ = 42560661153162. Its totient is φ = 42560661153160.

The previous prime is 42560661153133. The next prime is 42560661153163. The reversal of 42560661153161 is 16135116606524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36806899463161 + 5753761690000 = 6066869^2 + 2398700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42560661153161 is a prime.

It is a super-2 number, since 2×42560661153161² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 42560661153163, 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 (42560661153163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21280330576580 + 21280330576581.

It is an arithmetic number, because the mean of its divisors is an integer number (21280330576581).

Almost surely, 2^{42560661153161} is an apocalyptic number.

It is an amenable number.

42560661153161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42560661153161 is an equidigital number, since it uses as much as digits as its factorization.

42560661153161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 47.

Adding to 42560661153161 its reverse (16135116606524), we get a palindrome (58695777759685).

The spelling of 42560661153161 in words is "forty-two trillion, five hundred sixty billion, six hundred sixty-one million, one hundred fifty-three thousand, one hundred sixty-one".