64663647271 has 2 divisors, whose sum is σ = 64663647272. Its totient is φ = 64663647270.

The previous prime is 64663647253. The next prime is 64663647313. The reversal of 64663647271 is 17274636646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64663647271 - 2¹¹ = 64663645223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64663647571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32331823635 + 32331823636.

It is an arithmetic number, because the mean of its divisors is an integer number (32331823636).

Almost surely, 2^64663647271 is an apocalyptic number.

64663647271 is a deficient number, since it is larger than the sum of its proper divisors (1).

64663647271 is an equidigital number, since it uses as much as digits as its factorization.

64663647271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 52.

The spelling of 64663647271 in words is "sixty-four billion, six hundred sixty-three million, six hundred forty-seven thousand, two hundred seventy-one".