8949991278 has 16 divisors (see below), whose sum is σ = 17916224256. Its totient is φ = 2980623480.

The previous prime is 8949991273. The next prime is 8949991279. The reversal of 8949991278 is 8721999498.

8949991278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8949991273) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 669568 + ... + 682803.

It is an arithmetic number, because the mean of its divisors is an integer number (1119764016).

Almost surely, 2^8949991278 is an apocalyptic number.

8949991278 is an abundant number, since it is smaller than the sum of its proper divisors (8966232978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8949991278 is a wasteful number, since it uses less digits than its factorization.

8949991278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353479.

The product of its digits is 23514624, while the sum is 66.

The square root of 8949991278 is about 94604.3935449089. The cubic root of 8949991278 is about 2076.2239860828.

The spelling of 8949991278 in words is "eight billion, nine hundred forty-nine million, nine hundred ninety-one thousand, two hundred seventy-eight".