64644303211 has 2 divisors, whose sum is σ = 64644303212. Its totient is φ = 64644303210.

The previous prime is 64644303169. The next prime is 64644303239. The reversal of 64644303211 is 11230344646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64644303211 - 2⁷ = 64644303083 is a prime.

It is not a weakly prime, because it can be changed into another prime (64644303271) 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 as a sum of consecutive naturals, namely, 32322151605 + 32322151606.

It is an arithmetic number, because the mean of its divisors is an integer number (32322151606).

Almost surely, 2^64644303211 is an apocalyptic number.

64644303211 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644303211 is an equidigital number, since it uses as much as digits as its factorization.

64644303211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

Adding to 64644303211 its reverse (11230344646), we get a palindrome (75874647857).

The spelling of 64644303211 in words is "sixty-four billion, six hundred forty-four million, three hundred three thousand, two hundred eleven".