9642687808 has 112 divisors (see below), whose sum is σ = 22085320320. Its totient is φ = 4141615104.

The previous prime is 9642687799. The next prime is 9642687913. The reversal of 9642687808 is 8087862469.

It is a congruent number.

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, 701223 + ... + 714841.

It is an arithmetic number, because the mean of its divisors is an integer number (197190360).

Almost surely, 2^9642687808 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 9642687808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11042660160).

9642687808 is an abundant number, since it is smaller than the sum of its proper divisors (12442632512).

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

9642687808 is a wasteful number, since it uses less digits than its factorization.

9642687808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13704 (or 13694 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 58.

The square root of 9642687808 is about 98197.1883915217. The cubic root of 9642687808 is about 2128.4626587458.

The spelling of 9642687808 in words is "nine billion, six hundred forty-two million, six hundred eighty-seven thousand, eight hundred eight".