6818875644 has 48 divisors (see below), whose sum is σ = 19253299968. Its totient is φ = 1833646848.

The previous prime is 6818875607. The next prime is 6818875663. The reversal of 6818875644 is 4465788186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2386134 + ... + 2388989.

It is an arithmetic number, because the mean of its divisors is an integer number (401110416).

Almost surely, 2^6818875644 is an apocalyptic number.

It is an amenable number.

6818875644 is an abundant number, since it is smaller than the sum of its proper divisors (12434424324).

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

6818875644 is a wasteful number, since it uses less digits than its factorization.

6818875644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775154 (or 4775152 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 57.

The square root of 6818875644 is about 82576.4836015678. The cubic root of 6818875644 is about 1896.2878252798.

The spelling of 6818875644 in words is "six billion, eight hundred eighteen million, eight hundred seventy-five thousand, six hundred forty-four".