9888634681 has 6 divisors (see below), whose sum is σ = 10504536110. Its totient is φ = 9306950016.

The previous prime is 9888634667. The next prime is 9888634699. The reversal of 9888634681 is 1864368889.

9888634681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 6012451600 + 3876183081 = 77540^2 + 62259^2 .

It is not a de Polignac number, because 9888634681 - 2¹⁷ = 9888503609 is a prime.

It is a super-2 number, since 2×9888634681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9888634601) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 17108076 + ... + 17108653.

Almost surely, 2^9888634681 is an apocalyptic number.

It is an amenable number.

9888634681 is a deficient number, since it is larger than the sum of its proper divisors (615901429).

9888634681 is a wasteful number, since it uses less digits than its factorization.

9888634681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34216763 (or 34216746 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 61.

The square root of 9888634681 is about 99441.6144327917. The cubic root of 9888634681 is about 2146.4071727527.

The spelling of 9888634681 in words is "nine billion, eight hundred eighty-eight million, six hundred thirty-four thousand, six hundred eighty-one".