8991165375 has 32 divisors (see below), whose sum is σ = 16623672000. Its totient is φ = 4795286400.

The previous prime is 8991165349. The next prime is 8991165461. The reversal of 8991165375 is 5735611998.

8991165375 is a `hidden beast` number, since 8 + 9 + 91 + 16 + 537 + 5 = 666.

It is not a de Polignac number, because 8991165375 - 2⁶ = 8991165311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1328650 + ... + 1335399.

It is an arithmetic number, because the mean of its divisors is an integer number (519489750).

Almost surely, 2^8991165375 is an apocalyptic number.

8991165375 is a deficient number, since it is larger than the sum of its proper divisors (7632506625).

8991165375 is a wasteful number, since it uses less digits than its factorization.

8991165375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664073 (or 2664057 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 8991165375 is about 94821.7558105733. The cubic root of 8991165375 is about 2079.4029794647.

The spelling of 8991165375 in words is "eight billion, nine hundred ninety-one million, one hundred sixty-five thousand, three hundred seventy-five".