9778448779 has 16 divisors (see below), whose sum is σ = 10964164320. Its totient is φ = 8645472000.

The previous prime is 9778448767. The next prime is 9778448831.

9778448779 is nontrivially palindromic in base 10.

9778448779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9778448779 - 2¹¹ = 9778446731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9778448179) 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 15 ways as a sum of consecutive naturals, for example, 22152 + ... + 141589.

It is an arithmetic number, because the mean of its divisors is an integer number (685260270).

Almost surely, 2^9778448779 is an apocalyptic number.

9778448779 is a deficient number, since it is larger than the sum of its proper divisors (1185715541).

9778448779 is a wasteful number, since it uses less digits than its factorization.

9778448779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163902.

The product of its digits is 199148544, while the sum is 70.

The square root of 9778448779 is about 98886.0393533890. The cubic root of 9778448779 is about 2138.4051338660.

The spelling of 9778448779 in words is "nine billion, seven hundred seventy-eight million, four hundred forty-eight thousand, seven hundred seventy-nine".