6918878123 has 4 divisors (see below), whose sum is σ = 6929159448. Its totient is φ = 6908596800.

The previous prime is 6918878117. The next prime is 6918878171. The reversal of 6918878123 is 3218788196.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6918878123 - 2¹⁰ = 6918877099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6918878723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5139653 + ... + 5140998.

It is an arithmetic number, because the mean of its divisors is an integer number (1732289862).

Almost surely, 2^6918878123 is an apocalyptic number.

6918878123 is a deficient number, since it is larger than the sum of its proper divisors (10281325).

6918878123 is a wasteful number, since it uses less digits than its factorization.

6918878123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10281324.

The product of its digits is 1161216, while the sum is 53.

The square root of 6918878123 is about 83179.7939586292. The cubic root of 6918878123 is about 1905.5129012552.

The spelling of 6918878123 in words is "six billion, nine hundred eighteen million, eight hundred seventy-eight thousand, one hundred twenty-three".