9641215249 has 4 divisors (see below), whose sum is σ = 9799268020. Its totient is φ = 9483162480.

The previous prime is 9641215169. The next prime is 9641215289. The reversal of 9641215249 is 9425121469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9425121469 = 73 ⋅129111253.

It can be written as a sum of positive squares in 2 ways, for example, as 5063745600 + 4577469649 = 71160^2 + 67657^2 .

It is not a de Polignac number, because 9641215249 - 2¹¹ = 9641213201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9641215289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79026294 + ... + 79026415.

It is an arithmetic number, because the mean of its divisors is an integer number (2449817005).

Almost surely, 2^9641215249 is an apocalyptic number.

It is an amenable number.

9641215249 is a deficient number, since it is larger than the sum of its proper divisors (158052771).

9641215249 is a wasteful number, since it uses less digits than its factorization.

9641215249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158052770.

The product of its digits is 155520, while the sum is 43.

The square root of 9641215249 is about 98189.6901359812. The cubic root of 9641215249 is about 2128.3543056093.

The spelling of 9641215249 in words is "nine billion, six hundred forty-one million, two hundred fifteen thousand, two hundred forty-nine".