161560417652161 has 6 divisors (see below), whose sum is σ = 177582938411186. Its totient is φ = 146873106956400.

The previous prime is 161560417652147. The next prime is 161560417652203. The reversal of 161560417652161 is 161256714065161.

161560417652161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 141551838773136 + 20008578879025 = 11897556^2 + 4473095^2 .

It is not a de Polignac number, because 161560417652161 - 2⁹ = 161560417651649 is a prime.

It is a super-2 number, since 2×161560417652161² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161560417652099 and 161560417652108.

It is not an unprimeable number, because it can be changed into a prime (161560417652261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667605031500 + ... + 667605031741.

Almost surely, 2^{161560417652161} is an apocalyptic number.

161560417652161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161560417652161 is a deficient number, since it is larger than the sum of its proper divisors (16022520759025).

161560417652161 is a wasteful number, since it uses less digits than its factorization.

161560417652161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335210063263 (or 1335210063252 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 161560417652161 in words is "one hundred sixty-one trillion, five hundred sixty billion, four hundred seventeen million, six hundred fifty-two thousand, one hundred sixty-one".