9855388111 has 4 divisors (see below), whose sum is σ = 9855587872. Its totient is φ = 9855188352.

The previous prime is 9855388057. The next prime is 9855388163. The reversal of 9855388111 is 1118835589.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9855388111 - 2¹¹ = 9855386063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855388511) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 33466 + ... + 144328.

It is an arithmetic number, because the mean of its divisors is an integer number (2463896968).

Almost surely, 2^9855388111 is an apocalyptic number.

9855388111 is a deficient number, since it is larger than the sum of its proper divisors (199761).

9855388111 is a wasteful number, since it uses less digits than its factorization.

9855388111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199760.

The product of its digits is 345600, while the sum is 49.

The square root of 9855388111 is about 99274.3074062972. The cubic root of 9855388111 is about 2143.9989939958.

The spelling of 9855388111 in words is "nine billion, eight hundred fifty-five million, three hundred eighty-eight thousand, one hundred eleven".