6818873856 has 80 divisors (see below), whose sum is σ = 18657032064. Its totient is φ = 2211508224.

The previous prime is 6818873813. The next prime is 6818873869. The reversal of 6818873856 is 6583788186.

It is a self number, because there is not a number n which added to its sum of digits gives 6818873856.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3160 + ... + 116823.

Almost surely, 2^6818873856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6818873856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9328516032).

6818873856 is an abundant number, since it is smaller than the sum of its proper divisors (11838158208).

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

6818873856 is a wasteful number, since it uses less digits than its factorization.

6818873856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120041 (or 120025 counting only the distinct ones).

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

The square root of 6818873856 is about 82576.4727752403. The cubic root of 6818873856 is about 1896.2876595358.

The spelling of 6818873856 in words is "six billion, eight hundred eighteen million, eight hundred seventy-three thousand, eight hundred fifty-six".