6400305249 has 32 divisors (see below), whose sum is σ = 10007491200. Its totient is φ = 3602672640.

The previous prime is 6400305217. The next prime is 6400305269. The reversal of 6400305249 is 9425030046.

6400305249 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6400305249 - 2⁵ = 6400305217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6400305209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127432 + ... + 170409.

It is an arithmetic number, because the mean of its divisors is an integer number (312734100).

Almost surely, 2^6400305249 is an apocalyptic number.

It is an amenable number.

6400305249 is a deficient number, since it is larger than the sum of its proper divisors (3607185951).

6400305249 is a wasteful number, since it uses less digits than its factorization.

6400305249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297905.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 6400305249 is about 80001.9077835023. The cubic root of 6400305249 is about 1856.6650504831.

The spelling of 6400305249 in words is "six billion, four hundred million, three hundred five thousand, two hundred forty-nine".