9878540879 has 18 divisors (see below), whose sum is σ = 10303169400. Its totient is φ = 9471064200.

The previous prime is 9878540809. The next prime is 9878540899. The reversal of 9878540879 is 9780458789.

9878540879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9878540879 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 (9878540809) 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 17 ways as a sum of consecutive naturals, for example, 16491422 + ... + 16492020.

It is an arithmetic number, because the mean of its divisors is an integer number (572398300).

Almost surely, 2^9878540879 is an apocalyptic number.

9878540879 is a deficient number, since it is larger than the sum of its proper divisors (424628521).

9878540879 is an equidigital number, since it uses as much as digits as its factorization.

9878540879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 761 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 65.

The square root of 9878540879 is about 99390.8490707268. The cubic root of 9878540879 is about 2145.6766106635.

The spelling of 9878540879 in words is "nine billion, eight hundred seventy-eight million, five hundred forty thousand, eight hundred seventy-nine".