6464440194323 has 2 divisors, whose sum is σ = 6464440194324. Its totient is φ = 6464440194322.

The previous prime is 6464440194301. The next prime is 6464440194349. The reversal of 6464440194323 is 3234910444646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6464440194323 - 2¹⁶ = 6464440128787 is a prime.

It is not a weakly prime, because it can be changed into another prime (6464440199323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232220097161 + 3232220097162.

It is an arithmetic number, because the mean of its divisors is an integer number (3232220097162).

Almost surely, 2^{6464440194323} is an apocalyptic number.

6464440194323 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464440194323 is an equidigital number, since it uses as much as digits as its factorization.

6464440194323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 6464440194323 in words is "six trillion, four hundred sixty-four billion, four hundred forty million, one hundred ninety-four thousand, three hundred twenty-three".