64243346929 has 2 divisors, whose sum is σ = 64243346930. Its totient is φ = 64243346928.

The previous prime is 64243346897. The next prime is 64243346989. The reversal of 64243346929 is 92964334246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64057079025 + 186267904 = 253095^2 + 13648^2 .

It is a cyclic number.

It is not a de Polignac number, because 64243346929 - 2⁵ = 64243346897 is a prime.

It is not a weakly prime, because it can be changed into another prime (64243346989) 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, 32121673464 + 32121673465.

It is an arithmetic number, because the mean of its divisors is an integer number (32121673465).

Almost surely, 2^64243346929 is an apocalyptic number.

It is an amenable number.

64243346929 is a deficient number, since it is larger than the sum of its proper divisors (1).

64243346929 is an equidigital number, since it uses as much as digits as its factorization.

64243346929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 52.

The spelling of 64243346929 in words is "sixty-four billion, two hundred forty-three million, three hundred forty-six thousand, nine hundred twenty-nine".