9161610091 has 4 divisors (see below), whose sum is σ = 9170328184. Its totient is φ = 9152892000.

The previous prime is 9161610089. The next prime is 9161610103. The reversal of 9161610091 is 1900161619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1900161619 = 3019 ⋅629401.

It is a cyclic number.

It is not a de Polignac number, because 9161610091 - 2¹ = 9161610089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9161610391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4357470 + ... + 4359571.

It is an arithmetic number, because the mean of its divisors is an integer number (2292582046).

Almost surely, 2^9161610091 is an apocalyptic number.

9161610091 is a deficient number, since it is larger than the sum of its proper divisors (8718093).

9161610091 is a wasteful number, since it uses less digits than its factorization.

9161610091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718092.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 9161610091 is about 95716.3000277382. The cubic root of 9161610091 is about 2092.4604990100.

The spelling of 9161610091 in words is "nine billion, one hundred sixty-one million, six hundred ten thousand, ninety-one".