64426510321 has 2 divisors, whose sum is σ = 64426510322. Its totient is φ = 64426510320.

The previous prime is 64426510307. The next prime is 64426510327. The reversal of 64426510321 is 12301562446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46455767296 + 17970743025 = 215536^2 + 134055^2 .

It is a cyclic number.

It is not a de Polignac number, because 64426510321 - 2⁵ = 64426510289 is a prime.

It is not a weakly prime, because it can be changed into another prime (64426510327) 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, 32213255160 + 32213255161.

It is an arithmetic number, because the mean of its divisors is an integer number (32213255161).

Almost surely, 2^64426510321 is an apocalyptic number.

It is an amenable number.

64426510321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64426510321 is an equidigital number, since it uses as much as digits as its factorization.

64426510321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 64426510321 in words is "sixty-four billion, four hundred twenty-six million, five hundred ten thousand, three hundred twenty-one".