9788278728879 has 24 divisors (see below), whose sum is σ = 16197935580320. Its totient is φ = 5579626560768.

The previous prime is 9788278728869. The next prime is 9788278728887.

9788278728879 is a `hidden beast` number, since 97 + 88 + 27 + 87 + 288 + 79 = 666.

9788278728879 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9788278728879 - 2⁸ = 9788278728623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9788278728869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189912502 + ... + 189964035.

Almost surely, 2^{9788278728879} is an apocalyptic number.

9788278728879 is a deficient number, since it is larger than the sum of its proper divisors (6409656851441).

9788278728879 is a wasteful number, since it uses less digits than its factorization.

9788278728879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379876959 (or 379876956 counting only the distinct ones).

The product of its digits is 25491013632, while the sum is 90.

The spelling of 9788278728879 in words is "nine trillion, seven hundred eighty-eight billion, two hundred seventy-eight million, seven hundred twenty-eight thousand, eight hundred seventy-nine".