64644305303 has 2 divisors, whose sum is σ = 64644305304. Its totient is φ = 64644305302.

The previous prime is 64644305279. The next prime is 64644305311. The reversal of 64644305303 is 30350344646.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64644305303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64644305353) 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, 32322152651 + 32322152652.

It is an arithmetic number, because the mean of its divisors is an integer number (32322152652).

Almost surely, 2^64644305303 is an apocalyptic number.

64644305303 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644305303 is an equidigital number, since it uses as much as digits as its factorization.

64644305303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 38.

Adding to 64644305303 its reverse (30350344646), we get a palindrome (94994649949).

The spelling of 64644305303 in words is "sixty-four billion, six hundred forty-four million, three hundred five thousand, three hundred three".