6812521818 has 8 divisors (see below), whose sum is σ = 13625043648. Its totient is φ = 2270840604.

The previous prime is 6812521817. The next prime is 6812521873. The reversal of 6812521818 is 8181252186.

6812521818 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

6812521818 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 6812521818.

It is not an unprimeable number, because it can be changed into a prime (6812521817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567710146 + ... + 567710157.

It is an arithmetic number, because the mean of its divisors is an integer number (1703130456).

Almost surely, 2^6812521818 is an apocalyptic number.

6812521818 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.

6812521818 is a wasteful number, since it uses less digits than its factorization.

6812521818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135420308.

The product of its digits is 61440, while the sum is 42.

The square root of 6812521818 is about 82538.0022656231. The cubic root of 6812521818 is about 1895.6986554628.

The spelling of 6812521818 in words is "six billion, eight hundred twelve million, five hundred twenty-one thousand, eight hundred eighteen".