64644303271 has 2 divisors, whose sum is σ = 64644303272. Its totient is φ = 64644303270.

The previous prime is 64644303257. The next prime is 64644303293. The reversal of 64644303271 is 17230344646.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64644303271 - 2⁵ = 64644303239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64644303211) 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, 32322151635 + 32322151636.

It is an arithmetic number, because the mean of its divisors is an integer number (32322151636).

Almost surely, 2^64644303271 is an apocalyptic number.

64644303271 is a deficient number, since it is larger than the sum of its proper divisors (1).

64644303271 is an equidigital number, since it uses as much as digits as its factorization.

64644303271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 64644303271 in words is "sixty-four billion, six hundred forty-four million, three hundred three thousand, two hundred seventy-one".