9191681612 has 24 divisors (see below), whose sum is σ = 16144989504. Its totient is φ = 4578850512.

The previous prime is 9191681579. The next prime is 9191681621. The reversal of 9191681612 is 2161861919.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2589623 + ... + 2593169.

It is an arithmetic number, because the mean of its divisors is an integer number (672707896).

Almost surely, 2^9191681612 is an apocalyptic number.

It is an amenable number.

9191681612 is a deficient number, since it is larger than the sum of its proper divisors (6953307892).

9191681612 is a wasteful number, since it uses less digits than its factorization.

9191681612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765 (or 5763 counting only the distinct ones).

The product of its digits is 46656, while the sum is 44.

The square root of 9191681612 is about 95873.2580650100. The cubic root of 9191681612 is about 2094.7473877799.

The spelling of 9191681612 in words is "nine billion, one hundred ninety-one million, six hundred eighty-one thousand, six hundred twelve".