64064688673 has 2 divisors, whose sum is σ = 64064688674. Its totient is φ = 64064688672.

The previous prime is 64064688659. The next prime is 64064688697. The reversal of 64064688673 is 37688646046.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63467717184 + 596971489 = 251928^2 + 24433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64064688673 is a prime.

It is not a weakly prime, because it can be changed into another prime (64064688613) 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, 32032344336 + 32032344337.

It is an arithmetic number, because the mean of its divisors is an integer number (32032344337).

Almost surely, 2^64064688673 is an apocalyptic number.

It is an amenable number.

64064688673 is a deficient number, since it is larger than the sum of its proper divisors (1).

64064688673 is an equidigital number, since it uses as much as digits as its factorization.

64064688673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27869184, while the sum is 58.

The spelling of 64064688673 in words is "sixty-four billion, sixty-four million, six hundred eighty-eight thousand, six hundred seventy-three".