9942111878 has 8 divisors (see below), whose sum is σ = 14949631560. Its totient is φ = 4958901360.

The previous prime is 9942111877. The next prime is 9942111911. The reversal of 9942111878 is 8781112499.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9942111871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6076268 + ... + 6077903.

It is an arithmetic number, because the mean of its divisors is an integer number (1868703945).

Almost surely, 2^9942111878 is an apocalyptic number.

9942111878 is a deficient number, since it is larger than the sum of its proper divisors (5007519682).

9942111878 is a wasteful number, since it uses less digits than its factorization.

9942111878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12154582.

The product of its digits is 290304, while the sum is 50.

The square root of 9942111878 is about 99710.1392938552. The cubic root of 9942111878 is about 2150.2694364331.

The spelling of 9942111878 in words is "nine billion, nine hundred forty-two million, one hundred eleven thousand, eight hundred seventy-eight".