6440306404199 has 2 divisors, whose sum is σ = 6440306404200. Its totient is φ = 6440306404198.

The previous prime is 6440306404153. The next prime is 6440306404331. The reversal of 6440306404199 is 9914046030446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6440306404199 - 2²⁰ = 6440305355623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6440306404109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220153202099 + 3220153202100.

It is an arithmetic number, because the mean of its divisors is an integer number (3220153202100).

Almost surely, 2^{6440306404199} is an apocalyptic number.

6440306404199 is a deficient number, since it is larger than the sum of its proper divisors (1).

6440306404199 is an equidigital number, since it uses as much as digits as its factorization.

6440306404199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 6440306404199 in words is "six trillion, four hundred forty billion, three hundred six million, four hundred four thousand, one hundred ninety-nine".