161611165011065 has 64 divisors (see below), whose sum is σ = 250158458142720. Its totient is φ = 97257494880000.

The previous prime is 161611165011041. The next prime is 161611165011089. The reversal of 161611165011065 is 560110561116161.

It is an interprime number because it is at equal distance from previous prime (161611165011041) and next prime (161611165011089).

It is not a de Polignac number, because 161611165011065 - 2¹⁰ = 161611165010041 is a prime.

It is a super-2 number, since 2×161611165011065² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 81767240 + ... + 83720390.

It is an arithmetic number, because the mean of its divisors is an integer number (3908725908480).

Almost surely, 2^{161611165011065} is an apocalyptic number.

It is an amenable number.

161611165011065 is a deficient number, since it is larger than the sum of its proper divisors (88547293131655).

161611165011065 is a wasteful number, since it uses less digits than its factorization.

161611165011065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960614.

The product of its (nonzero) digits is 32400, while the sum is 41.

The spelling of 161611165011065 in words is "one hundred sixty-one trillion, six hundred eleven billion, one hundred sixty-five million, eleven thousand, sixty-five".