6818875638 has 8 divisors (see below), whose sum is σ = 13637751288. Its totient is φ = 2272958544.

The previous prime is 6818875607. The next prime is 6818875663. The reversal of 6818875638 is 8365788186.

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

6818875638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568239631 + ... + 568239642.

It is an arithmetic number, because the mean of its divisors is an integer number (1704718911).

Almost surely, 2^6818875638 is an apocalyptic number.

6818875638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6818875638 is a wasteful number, since it uses less digits than its factorization.

6818875638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136479278.

The product of its digits is 15482880, while the sum is 60.

The square root of 6818875638 is about 82576.4835652379. The cubic root of 6818875638 is about 1896.2878247236.

It can be divided in two parts, 6818 and 875638, that added together give a triangular number (882456 = T₁₃₂₈).

The spelling of 6818875638 in words is "six billion, eight hundred eighteen million, eight hundred seventy-five thousand, six hundred thirty-eight".