9161440905 has 32 divisors (see below), whose sum is σ = 14741895168. Its totient is φ = 4858315200.

The previous prime is 9161440877. The next prime is 9161440973. The reversal of 9161440905 is 5090441619.

It is not a de Polignac number, because 9161440905 - 2²⁵ = 9127886473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2319142 + ... + 2323088.

It is an arithmetic number, because the mean of its divisors is an integer number (460684224).

Almost surely, 2^9161440905 is an apocalyptic number.

It is an amenable number.

9161440905 is a deficient number, since it is larger than the sum of its proper divisors (5580454263).

9161440905 is a wasteful number, since it uses less digits than its factorization.

9161440905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 9161440905 is about 95715.4162347947. The cubic root of 9161440905 is about 2092.4476185520.

The spelling of 9161440905 in words is "nine billion, one hundred sixty-one million, four hundred forty thousand, nine hundred five".