9846209309689 has 9 divisors (see below), whose sum is σ = 10292993684463. Its totient is φ = 9418044219672.

The previous prime is 9846209309669. The next prime is 9846209309707. The reversal of 9846209309689 is 9869039026489.

The square root of 9846209309689 is 3137867.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7071786074089 + 2774423235600 = 2659283^2 + 1665660^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9846209309689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9846209309659) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 72102727 + ... + 72239155.

Almost surely, 2^{9846209309689} is an apocalyptic number.

9846209309689 is the 3137867-th square number.

9846209309689 is the 1568934-th centered octagonal number.

It is an amenable number.

9846209309689 is a deficient number, since it is larger than the sum of its proper divisors (446784374774).

9846209309689 is an frugal number, since it uses more digits than its factorization.

9846209309689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272904 (or 136452 counting only the distinct ones).

The product of its (nonzero) digits is 362797056, while the sum is 73.

The spelling of 9846209309689 in words is "nine trillion, eight hundred forty-six billion, two hundred nine million, three hundred nine thousand, six hundred eighty-nine".