9621561606696 has 96 divisors (see below), whose sum is σ = 28065207348360. Its totient is φ = 2960235818496.

The previous prime is 9621561606689. The next prime is 9621561606809. The reversal of 9621561606696 is 6966061651269.

It is a happy number.

9621561606696 is a `hidden beast` number, since 9 + 6 + 2 + 1 + 5 + 616 + 0 + 6 + 6 + 9 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4835469060900 + 4786092545796 = 2198970^2 + 2187714^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11072626 + ... + 11909918.

Almost surely, 2^{9621561606696} is an apocalyptic number.

It is an amenable number.

9621561606696 is an abundant number, since it is smaller than the sum of its proper divisors (18443645741664).

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

9621561606696 is a wasteful number, since it uses less digits than its factorization.

9621561606696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849595 (or 849588 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 63.

The spelling of 9621561606696 in words is "nine trillion, six hundred twenty-one billion, five hundred sixty-one million, six hundred six thousand, six hundred ninety-six".