9689642688 has 112 divisors (see below), whose sum is σ = 28442229120. Its totient is φ = 2886451200.

The previous prime is 9689642593. The next prime is 9689642693. The reversal of 9689642688 is 8862469869.

It is a super-2 number, since 2×9689642688² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85728 + ... + 163488.

Almost surely, 2^9689642688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9689642688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14221114560).

9689642688 is an abundant number, since it is smaller than the sum of its proper divisors (18752586432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9689642688 is a wasteful number, since it uses less digits than its factorization.

9689642688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77846 (or 77836 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 66.

The square root of 9689642688 is about 98435.9826892585. The cubic root of 9689642688 is about 2131.9119019010.

The spelling of 9689642688 in words is "nine billion, six hundred eighty-nine million, six hundred forty-two thousand, six hundred eighty-eight".