9631881369 has 64 divisors (see below), whose sum is σ = 16515290880. Its totient is φ = 5483151360.

The previous prime is 9631881361. The next prime is 9631881377.

9631881369 is nontrivially palindromic in base 10.

9631881369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9631881361) and next prime (9631881377).

It is not a de Polignac number, because 9631881369 - 2³ = 9631881361 is a prime.

It is a super-2 number, since 2×9631881369² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9631881361) 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 63 ways as a sum of consecutive naturals, for example, 2992449 + ... + 2995665.

It is an arithmetic number, because the mean of its divisors is an integer number (258051420).

Almost surely, 2^9631881369 is an apocalyptic number.

9631881369 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

9631881369 is a deficient number, since it is larger than the sum of its proper divisors (6883409511).

9631881369 is a wasteful number, since it uses less digits than its factorization.

9631881369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847 (or 3841 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 9631881369 is about 98142.1487893963. The cubic root of 9631881369 is about 2127.6672477551.

The spelling of 9631881369 in words is "nine billion, six hundred thirty-one million, eight hundred eighty-one thousand, three hundred sixty-nine".