9981610855 has 24 divisors (see below), whose sum is σ = 12468682512. Its totient is φ = 7666813056.

The previous prime is 9981610813. The next prime is 9981610867. The reversal of 9981610855 is 5580161899.

It is not a de Polignac number, because 9981610855 - 2²¹ = 9979513703 is a prime.

It is a Duffinian number.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 741747 + ... + 755083.

It is an arithmetic number, because the mean of its divisors is an integer number (519528438).

Almost surely, 2^9981610855 is an apocalyptic number.

9981610855 is a deficient number, since it is larger than the sum of its proper divisors (2487071657).

9981610855 is a wasteful number, since it uses less digits than its factorization.

9981610855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13503 (or 13444 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 52.

The square root of 9981610855 is about 99908.0119660080. The cubic root of 9981610855 is about 2153.1132726458.

The spelling of 9981610855 in words is "nine billion, nine hundred eighty-one million, six hundred ten thousand, eight hundred fifty-five".