161071162165611 has 24 divisors (see below), whose sum is σ = 233555169687840. Its totient is φ = 106966964995200.

The previous prime is 161071162165583. The next prime is 161071162165643. The reversal of 161071162165611 is 116561261170161.

161071162165611 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 7 + 1 + 1 + 6 + 21 + 6 + 5 + 611 = 666.

It is not a de Polignac number, because 161071162165611 - 2¹⁰ = 161071162164587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161071162565611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13180306 + ... + 22267976.

It is an arithmetic number, because the mean of its divisors is an integer number (9731465403660).

Almost surely, 2^{161071162165611} is an apocalyptic number.

161071162165611 is a deficient number, since it is larger than the sum of its proper divisors (72484007522229).

161071162165611 is a wasteful number, since it uses less digits than its factorization.

161071162165611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9095267 (or 9095264 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 161071162165611 in words is "one hundred sixty-one trillion, seventy-one billion, one hundred sixty-two million, one hundred sixty-five thousand, six hundred eleven".