6783375509 has 2 divisors, whose sum is σ = 6783375510. Its totient is φ = 6783375508.

The previous prime is 6783375481. The next prime is 6783375523. The reversal of 6783375509 is 9055733876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5254800100 + 1528575409 = 72490^2 + 39097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6783375509 is a prime.

It is a super-2 number, since 2×6783375509² = 92028366592202018162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6783375539) 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 as a sum of consecutive naturals, namely, 3391687754 + 3391687755.

It is an arithmetic number, because the mean of its divisors is an integer number (3391687755).

Almost surely, 2^6783375509 is an apocalyptic number.

It is an amenable number.

6783375509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6783375509 is an equidigital number, since it uses as much as digits as its factorization.

6783375509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 53.

The square root of 6783375509 is about 82361.2500451517. The cubic root of 6783375509 is about 1892.9913074035.

The spelling of 6783375509 in words is "six billion, seven hundred eighty-three million, three hundred seventy-five thousand, five hundred nine".