9161506161 has 16 divisors (see below), whose sum is σ = 13861382400. Its totient is φ = 5977719504.

The previous prime is 9161506157. The next prime is 9161506163. The reversal of 9161506161 is 1616051619.

9161506161 is a `hidden beast` number, since 91 + 6 + 1 + 506 + 1 + 61 = 666.

It is not a de Polignac number, because 9161506161 - 2² = 9161506157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9161506163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3608466 + ... + 3611003.

It is an arithmetic number, because the mean of its divisors is an integer number (866336400).

Almost surely, 2^9161506161 is an apocalyptic number.

It is an amenable number.

9161506161 is a deficient number, since it is larger than the sum of its proper divisors (4699876239).

9161506161 is a wasteful number, since it uses less digits than its factorization.

9161506161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7219525 (or 7219519 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 9161506161 is about 95715.7571197136. The cubic root of 9161506161 is about 2092.4525866365.

The spelling of 9161506161 in words is "nine billion, one hundred sixty-one million, five hundred six thousand, one hundred sixty-one".