9981354185 has 16 divisors (see below), whose sum is σ = 13102922880. Its totient is φ = 7238931840.

The previous prime is 9981354179. The next prime is 9981354193. The reversal of 9981354185 is 5814531899.

It is a happy number.

9981354185 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9981354185 - 2¹⁶ = 9981288649 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 233012 + ... + 272501.

It is an arithmetic number, because the mean of its divisors is an integer number (818932680).

Almost surely, 2^9981354185 is an apocalyptic number.

It is an amenable number.

9981354185 is a deficient number, since it is larger than the sum of its proper divisors (3121568695).

9981354185 is a wasteful number, since it uses less digits than its factorization.

9981354185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505888.

The product of its digits is 1555200, while the sum is 53.

The square root of 9981354185 is about 99906.7274261348. The cubic root of 9981354185 is about 2153.0948172305.

The spelling of 9981354185 in words is "nine billion, nine hundred eighty-one million, three hundred fifty-four thousand, one hundred eighty-five".