9878968449 has 27 divisors (see below), whose sum is σ = 16602863043. Its totient is φ = 5643932112.

The previous prime is 9878968423. The next prime is 9878968453. The reversal of 9878968449 is 9448698789.

The square root of 9878968449 is 99393.

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

9878968449 is a `hidden beast` number, since 98 + 7 + 8 + 96 + 8 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1755191025 + 8123777424 = 41895^2 + 90132^2 .

It is not a de Polignac number, because 9878968449 - 2⁵ = 9878968417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9878968459) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 2084887 + ... + 2089619.

Almost surely, 2^9878968449 is an apocalyptic number.

9878968449 is the 99393-rd square number.

9878968449 is the 49697-th centered octagonal number.

It is an amenable number.

9878968449 is a deficient number, since it is larger than the sum of its proper divisors (6723894594).

9878968449 is an frugal number, since it uses more digits than its factorization.

9878968449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486 (or 4743 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The cubic root of 9878968449 is about 2145.7075671149.

The spelling of 9878968449 in words is "nine billion, eight hundred seventy-eight million, nine hundred sixty-eight thousand, four hundred forty-nine".