6780005249 has 2 divisors, whose sum is σ = 6780005250. Its totient is φ = 6780005248.

The previous prime is 6780005233. The next prime is 6780005261. The reversal of 6780005249 is 9425000876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6767530225 + 12475024 = 82265^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 6780005249 - 2⁴ = 6780005233 is a prime.

It is not a weakly prime, because it can be changed into another prime (6780005269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390002624 + 3390002625.

It is an arithmetic number, because the mean of its divisors is an integer number (3390002625).

Almost surely, 2^6780005249 is an apocalyptic number.

It is an amenable number.

6780005249 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780005249 is an equidigital number, since it uses as much as digits as its factorization.

6780005249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 6780005249 is about 82340.7872745944. The cubic root of 6780005249 is about 1892.6777501506.

The spelling of 6780005249 in words is "six billion, seven hundred eighty million, five thousand, two hundred forty-nine".