64334342321 has 2 divisors, whose sum is σ = 64334342322. Its totient is φ = 64334342320.

The previous prime is 64334342311. The next prime is 64334342363. The reversal of 64334342321 is 12324343346.

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., 47334094096 + 17000248225 = 217564^2 + 130385^2 .

It is a cyclic number.

It is not a de Polignac number, because 64334342321 - 2¹⁸ = 64334080177 is a prime.

It is a super-2 number, since 2×64334342321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64334342311) 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, 32167171160 + 32167171161.

It is an arithmetic number, because the mean of its divisors is an integer number (32167171161).

Almost surely, 2^64334342321 is an apocalyptic number.

It is an amenable number.

64334342321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64334342321 is an equidigital number, since it uses as much as digits as its factorization.

64334342321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 35.

Adding to 64334342321 its reverse (12324343346), we get a palindrome (76658685667).

The spelling of 64334342321 in words is "sixty-four billion, three hundred thirty-four million, three hundred forty-two thousand, three hundred twenty-one".