9198738878 has 32 divisors (see below), whose sum is σ = 16096916160. Its totient is φ = 3860962560.

The previous prime is 9198738863. The next prime is 9198738893. The reversal of 9198738878 is 8788378919.

9198738878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9198738863) and next prime (9198738893).

It is a congruent number.

It is an unprimeable number.

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, 175868 + ... + 222096.

It is an arithmetic number, because the mean of its divisors is an integer number (503028630).

Almost surely, 2^9198738878 is an apocalyptic number.

9198738878 is a deficient number, since it is larger than the sum of its proper divisors (6898177282).

9198738878 is a wasteful number, since it uses less digits than its factorization.

9198738878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46532.

The product of its digits is 48771072, while the sum is 68.

The square root of 9198738878 is about 95910.0561880765. The cubic root of 9198738878 is about 2095.2833581751.

The spelling of 9198738878 in words is "nine billion, one hundred ninety-eight million, seven hundred thirty-eight thousand, eight hundred seventy-eight".