518679327138 has 64 divisors (see below), whose sum is σ = 1226440998912. Its totient is φ = 143103723840.

The previous prime is 518679327121. The next prime is 518679327143. The reversal of 518679327138 is 831723976815.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 172620 + ... + 1033032.

It is an arithmetic number, because the mean of its divisors is an integer number (19163140608).

Almost surely, 2^518679327138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 518679327138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (613220499456).

518679327138 is an abundant number, since it is smaller than the sum of its proper divisors (707761671774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518679327138 is a wasteful number, since it uses less digits than its factorization.

518679327138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860919.

The product of its digits is 15240960, while the sum is 60.

The spelling of 518679327138 in words is "five hundred eighteen billion, six hundred seventy-nine million, three hundred twenty-seven thousand, one hundred thirty-eight".