6400305217 has 2 divisors, whose sum is σ = 6400305218. Its totient is φ = 6400305216.

The previous prime is 6400305209. The next prime is 6400305269. The reversal of 6400305217 is 7125030046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6343166736 + 57138481 = 79644^2 + 7559^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400305217 - 2³ = 6400305209 is a prime.

It is not a weakly prime, because it can be changed into another prime (6400308217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200152608 + 3200152609.

It is an arithmetic number, because the mean of its divisors is an integer number (3200152609).

Almost surely, 2^6400305217 is an apocalyptic number.

It is an amenable number.

6400305217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400305217 is an equidigital number, since it uses as much as digits as its factorization.

6400305217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 6400305217 is about 80001.9075835070. The cubic root of 6400305217 is about 1856.6650473888.

The spelling of 6400305217 in words is "six billion, four hundred million, three hundred five thousand, two hundred seventeen".