161651050061161 has 12 divisors (see below), whose sum is σ = 172340176285200. Its totient is φ = 151204579693128.

The previous prime is 161651050061107. The next prime is 161651050061167. The reversal of 161651050061161 is 161160050156161.

It is not a de Polignac number, because 161651050061161 - 2¹¹ = 161651050059113 is a prime.

It is a super-2 number, since 2×161651050061161² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161651050061167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681498951 + ... + 681736108.

It is an arithmetic number, because the mean of its divisors is an integer number (14361681357100).

Almost surely, 2^{161651050061161} is an apocalyptic number.

It is an amenable number.

161651050061161 is a deficient number, since it is larger than the sum of its proper divisors (10689126224039).

161651050061161 is an equidigital number, since it uses as much as digits as its factorization.

161651050061161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363235236 (or 1363235157 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 40.

The spelling of 161651050061161 in words is "one hundred sixty-one trillion, six hundred fifty-one billion, fifty million, sixty-one thousand, one hundred sixty-one".