6815375993 has 2 divisors, whose sum is σ = 6815375994. Its totient is φ = 6815375992.

The previous prime is 6815375989. The next prime is 6815376037. The reversal of 6815375993 is 3995735186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6645021289 + 170354704 = 81517^2 + 13052^2 .

It is a cyclic number.

It is not a de Polignac number, because 6815375993 - 2² = 6815375989 is a prime.

It is not a weakly prime, because it can be changed into another prime (6815375923) 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 as a sum of consecutive naturals, namely, 3407687996 + 3407687997.

It is an arithmetic number, because the mean of its divisors is an integer number (3407687997).

Almost surely, 2^6815375993 is an apocalyptic number.

It is an amenable number.

6815375993 is a deficient number, since it is larger than the sum of its proper divisors (1).

6815375993 is an equidigital number, since it uses as much as digits as its factorization.

6815375993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 56.

The square root of 6815375993 is about 82555.2905209593. The cubic root of 6815375993 is about 1895.9633592154.

The spelling of 6815375993 in words is "six billion, eight hundred fifteen million, three hundred seventy-five thousand, nine hundred ninety-three".