9138918668 has 24 divisors (see below), whose sum is σ = 18009836544. Its totient is φ = 4020051600.

The previous prime is 9138918653. The next prime is 9138918689. The reversal of 9138918668 is 8668198319.

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 7 ways as a sum of consecutive naturals, for example, 3348680 + ... + 3351407.

It is an arithmetic number, because the mean of its divisors is an integer number (750409856).

Almost surely, 2^9138918668 is an apocalyptic number.

It is an amenable number.

9138918668 is a deficient number, since it is larger than the sum of its proper divisors (8870917876).

9138918668 is a wasteful number, since it uses less digits than its factorization.

9138918668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6700133 (or 6700131 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 59.

The square root of 9138918668 is about 95597.6917503765. The cubic root of 9138918668 is about 2090.7315394350.

The spelling of 9138918668 in words is "nine billion, one hundred thirty-eight million, nine hundred eighteen thousand, six hundred sixty-eight".