6815538394 has 16 divisors (see below), whose sum is σ = 11700464256. Its totient is φ = 2916774000.

The previous prime is 6815538371. The next prime is 6815538403. The reversal of 6815538394 is 4938355186.

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 7 ways as a sum of consecutive naturals, for example, 337422 + ... + 357049.

It is an arithmetic number, because the mean of its divisors is an integer number (731279016).

Almost surely, 2^6815538394 is an apocalyptic number.

6815538394 is a deficient number, since it is larger than the sum of its proper divisors (4884925862).

6815538394 is a wasteful number, since it uses less digits than its factorization.

6815538394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695181.

The product of its digits is 3110400, while the sum is 52.

The square root of 6815538394 is about 82556.2741043950. The cubic root of 6815538394 is about 1895.9784184921.

The spelling of 6815538394 in words is "six billion, eight hundred fifteen million, five hundred thirty-eight thousand, three hundred ninety-four".