9988910631 has 48 divisors (see below), whose sum is σ = 17233471200. Its totient is φ = 5701643136.

The previous prime is 9988910627. The next prime is 9988910651. The reversal of 9988910631 is 1360198899.

9988910631 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 9988910631 - 2² = 9988910627 is a prime.

It is a super-2 number, since 2×9988910631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988910651) 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 47 ways as a sum of consecutive naturals, for example, 1363005 + ... + 1370313.

It is an arithmetic number, because the mean of its divisors is an integer number (359030650).

Almost surely, 2^9988910631 is an apocalyptic number.

9988910631 is a deficient number, since it is larger than the sum of its proper divisors (7244560569).

9988910631 is a wasteful number, since it uses less digits than its factorization.

9988910631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8365 (or 8352 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 9988910631 is about 99944.5377747078. The cubic root of 9988910631 is about 2153.6380180975.

The spelling of 9988910631 in words is "nine billion, nine hundred eighty-eight million, nine hundred ten thousand, six hundred thirty-one".