6259278409 has 2 divisors, whose sum is σ = 6259278410. Its totient is φ = 6259278408.

The previous prime is 6259278349. The next prime is 6259278427. The reversal of 6259278409 is 9048729526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3711855625 + 2547422784 = 60925^2 + 50472^2 .

It is a cyclic number.

It is not a de Polignac number, because 6259278409 - 2⁹ = 6259277897 is a prime.

It is not a weakly prime, because it can be changed into another prime (6259278499) 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, 3129639204 + 3129639205.

It is an arithmetic number, because the mean of its divisors is an integer number (3129639205).

Almost surely, 2^6259278409 is an apocalyptic number.

It is an amenable number.

6259278409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6259278409 is an equidigital number, since it uses as much as digits as its factorization.

6259278409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 6259278409 is about 79115.6015524119. The cubic root of 6259278409 is about 1842.9268173219.

The spelling of 6259278409 in words is "six billion, two hundred fifty-nine million, two hundred seventy-eight thousand, four hundred nine".