6789135649 has 2 divisors, whose sum is σ = 6789135650. Its totient is φ = 6789135648.

The previous prime is 6789135643. The next prime is 6789135667. The reversal of 6789135649 is 9465319876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4496641249 + 2292494400 = 67057^2 + 47880^2 .

It is a cyclic number.

It is not a de Polignac number, because 6789135649 - 2¹¹ = 6789133601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6789135593 and 6789135602.

It is not a weakly prime, because it can be changed into another prime (6789135643) 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, 3394567824 + 3394567825.

It is an arithmetic number, because the mean of its divisors is an integer number (3394567825).

Almost surely, 2^6789135649 is an apocalyptic number.

It is an amenable number.

6789135649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6789135649 is an equidigital number, since it uses as much as digits as its factorization.

6789135649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9797760, while the sum is 58.

The square root of 6789135649 is about 82396.2113752811. The cubic root of 6789135649 is about 1893.5269704139.

The spelling of 6789135649 in words is "six billion, seven hundred eighty-nine million, one hundred thirty-five thousand, six hundred forty-nine".