9661634825 has 24 divisors (see below), whose sum is σ = 12152436480. Its totient is φ = 7618665600.

The previous prime is 9661634713. The next prime is 9661634833. The reversal of 9661634825 is 5284361669.

9661634825 is nontrivially palindromic in base 13.

9661634825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9661634825 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1274045 + ... + 1281605.

It is an arithmetic number, because the mean of its divisors is an integer number (506351520).

Almost surely, 2^9661634825 is an apocalyptic number.

It is an amenable number.

9661634825 is a deficient number, since it is larger than the sum of its proper divisors (2490801655).

9661634825 is a wasteful number, since it uses less digits than its factorization.

9661634825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297 (or 8292 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 9661634825 is about 98293.6153826890. The cubic root of 9661634825 is about 2129.8558260912.

The spelling of 9661634825 in words is "nine billion, six hundred sixty-one million, six hundred thirty-four thousand, eight hundred twenty-five".