6815828069 has 4 divisors (see below), whose sum is σ = 6982067820. Its totient is φ = 6649588320.

The previous prime is 6815828039. The next prime is 6815828077. The reversal of 6815828069 is 9608285186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9608285186 = 2 ⋅4804142593.

It can be written as a sum of positive squares in 2 ways, for example, as 3444516100 + 3371311969 = 58690^2 + 58063^2 .

It is a cyclic number.

It is not a de Polignac number, because 6815828069 - 2⁸ = 6815827813 is a prime.

It is a super-2 number, since 2×6815828069² = 92911024532336537522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6815828069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6815828009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83119814 + ... + 83119895.

It is an arithmetic number, because the mean of its divisors is an integer number (1745516955).

Almost surely, 2^6815828069 is an apocalyptic number.

It is an amenable number.

6815828069 is a deficient number, since it is larger than the sum of its proper divisors (166239751).

6815828069 is a wasteful number, since it uses less digits than its factorization.

6815828069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166239750.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The square root of 6815828069 is about 82558.0284951137. The cubic root of 6815828069 is about 1896.0052791614.

The spelling of 6815828069 in words is "six billion, eight hundred fifteen million, eight hundred twenty-eight thousand, sixty-nine".