6464244400109 has 2 divisors, whose sum is σ = 6464244400110. Its totient is φ = 6464244400108.

The previous prime is 6464244399989. The next prime is 6464244400123. The reversal of 6464244400109 is 9010044424646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6396867815209 + 67376584900 = 2529203^2 + 259570^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464244400109 - 2⁸ = 6464244399853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6464244400109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6464244405109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232122200054 + 3232122200055.

It is an arithmetic number, because the mean of its divisors is an integer number (3232122200055).

Almost surely, 2^{6464244400109} is an apocalyptic number.

It is an amenable number.

6464244400109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464244400109 is an equidigital number, since it uses as much as digits as its factorization.

6464244400109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 6464244400109 in words is "six trillion, four hundred sixty-four billion, two hundred forty-four million, four hundred thousand, one hundred nine".