123565535063161 has 2 divisors, whose sum is σ = 123565535063162. Its totient is φ = 123565535063160.

The previous prime is 123565535063153. The next prime is 123565535063203. The reversal of 123565535063161 is 161360535565321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64021841863225 + 59543693199936 = 8001365^2 + 7716456^2 .

It is an emirp because it is prime and its reverse (161360535565321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123565535063161 - 2³ = 123565535063153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123565535063099 and 123565535063108.

It is not a weakly prime, because it can be changed into another prime (123565535063261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61782767531580 + 61782767531581.

It is an arithmetic number, because the mean of its divisors is an integer number (61782767531581).

Almost surely, 2^{123565535063161} is an apocalyptic number.

It is an amenable number.

123565535063161 is a deficient number, since it is larger than the sum of its proper divisors (1).

123565535063161 is an equidigital number, since it uses as much as digits as its factorization.

123565535063161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290000, while the sum is 52.

The spelling of 123565535063161 in words is "one hundred twenty-three trillion, five hundred sixty-five billion, five hundred thirty-five million, sixty-three thousand, one hundred sixty-one".