9381561938 has 16 divisors (see below), whose sum is σ = 16084483584. Its totient is φ = 4020217920.

The previous prime is 9381561919. The next prime is 9381561941. The reversal of 9381561938 is 8391651839.

9381561938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9381561938.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112031 + ... + 176957.

It is an arithmetic number, because the mean of its divisors is an integer number (1005280224).

Almost surely, 2^9381561938 is an apocalyptic number.

9381561938 is a deficient number, since it is larger than the sum of its proper divisors (6702921646).

9381561938 is a wasteful number, since it uses less digits than its factorization.

9381561938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75257.

The product of its digits is 1399680, while the sum is 53.

The square root of 9381561938 is about 96858.4634298934. The cubic root of 9381561938 is about 2109.0735087720.

The spelling of 9381561938 in words is "nine billion, three hundred eighty-one million, five hundred sixty-one thousand, nine hundred thirty-eight".