9684687857625 has 120 divisors (see below), whose sum is σ = 19845721391496. Its totient is φ = 4695605640000.

The previous prime is 9684687857591. The next prime is 9684687857639. The reversal of 9684687857625 is 5267587864869.

9684687857625 is a `hidden beast` number, since 9 + 6 + 8 + 468 + 7 + 85 + 76 + 2 + 5 = 666.

9684687857625 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 4 ways, for example, as 185544701001 + 9499143156624 = 430749^2 + 3082068^2 .

It is not a de Polignac number, because 9684687857625 - 2¹⁰ = 9684687856601 is a prime.

It is a super-2 number, since 2×9684687857625² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2727406 + ... + 5177655.

Almost surely, 2^{9684687857625} is an apocalyptic number.

It is an amenable number.

9684687857625 is an abundant number, since it is smaller than the sum of its proper divisors (10161033533871).

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

9684687857625 is a wasteful number, since it uses less digits than its factorization.

9684687857625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905110 (or 7905080 counting only the distinct ones).

The product of its digits is 9754214400, while the sum is 81.

The spelling of 9684687857625 in words is "nine trillion, six hundred eighty-four billion, six hundred eighty-seven million, eight hundred fifty-seven thousand, six hundred twenty-five".