161173711262061 has 6 divisors (see below), whose sum is σ = 232806471822990. Its totient is φ = 107449140841368.

The previous prime is 161173711261907. The next prime is 161173711262101. The reversal of 161173711262061 is 160262117371161.

161173711262061 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 7 + 3 + 7 + 1 + 12 + 620 + 6 + 1 = 666.

161173711262061 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., 156130497857961 + 5043213404100 = 12495219^2 + 2245710^2 .

It is a de Polignac number, because none of the positive numbers 2^k-161173711262061 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161173711261998 and 161173711262016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161173711262261) 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, 8954095070106 + ... + 8954095070123.

It is an arithmetic number, because the mean of its divisors is an integer number (38801078637165).

Almost surely, 2^{161173711262061} is an apocalyptic number.

It is an amenable number.

161173711262061 is a deficient number, since it is larger than the sum of its proper divisors (71632760560929).

161173711262061 is a wasteful number, since it uses less digits than its factorization.

161173711262061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17908190140235 (or 17908190140232 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The spelling of 161173711262061 in words is "one hundred sixty-one trillion, one hundred seventy-three billion, seven hundred eleven million, two hundred sixty-two thousand, sixty-one".