9641865249 has 27 divisors (see below), whose sum is σ = 14156767027. Its totient is φ = 6323629200.

The previous prime is 9641865217. The next prime is 9641865263. The reversal of 9641865249 is 9425681469.

The square root of 9641865249 is 98193.

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., 3090581649 + 6551283600 = 55593^2 + 80940^2 .

It is not a de Polignac number, because 9641865249 - 2⁵ = 9641865217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9641865195 and 9641865204.

It is not an unprimeable number, because it can be changed into a prime (9641865209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20914879 + ... + 20915339.

Almost surely, 2^9641865249 is an apocalyptic number.

9641865249 is the 98193-rd square number.

9641865249 is the 49097-th centered octagonal number.

It is an amenable number.

9641865249 is a deficient number, since it is larger than the sum of its proper divisors (4514901778).

9641865249 is an frugal number, since it uses more digits than its factorization.

9641865249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070 (or 535 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The cubic root of 9641865249 is about 2128.4021349604.

The spelling of 9641865249 in words is "nine billion, six hundred forty-one million, eight hundred sixty-five thousand, two hundred forty-nine".