64675370729 has 2 divisors, whose sum is σ = 64675370730. Its totient is φ = 64675370728.

The previous prime is 64675370717. The next prime is 64675370827. The reversal of 64675370729 is 92707357646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37665105625 + 27010265104 = 194075^2 + 164348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64675370729 is a prime.

It is not a weakly prime, because it can be changed into another prime (64675379729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32337685364 + 32337685365.

It is an arithmetic number, because the mean of its divisors is an integer number (32337685365).

Almost surely, 2^64675370729 is an apocalyptic number.

It is an amenable number.

64675370729 is a deficient number, since it is larger than the sum of its proper divisors (1).

64675370729 is an equidigital number, since it uses as much as digits as its factorization.

64675370729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13335840, while the sum is 56.

The spelling of 64675370729 in words is "sixty-four billion, six hundred seventy-five million, three hundred seventy thousand, seven hundred twenty-nine".