161071162165586 has 16 divisors (see below), whose sum is σ = 242370042096600. Its totient is φ = 80281150508160.

The previous prime is 161071162165583. The next prime is 161071162165643. The reversal of 161071162165586 is 685561261170161.

161071162165586 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 4 ways, for example, as 121537814287561 + 39533347878025 = 11024419^2 + 6287555^2 .

It is not an unprimeable number, because it can be changed into a prime (161071162165583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177143240 + ... + 178050188.

Almost surely, 2^{161071162165586} is an apocalyptic number.

161071162165586 is a deficient number, since it is larger than the sum of its proper divisors (81298879931014).

161071162165586 is a wasteful number, since it uses less digits than its factorization.

161071162165586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187389.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 161071162165586 in words is "one hundred sixty-one trillion, seventy-one billion, one hundred sixty-two million, one hundred sixty-five thousand, five hundred eighty-six".