64320021859 has 2 divisors, whose sum is σ = 64320021860. Its totient is φ = 64320021858.

The previous prime is 64320021839. The next prime is 64320021869. The reversal of 64320021859 is 95812002346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64320021859 - 2²⁹ = 63783150947 is a prime.

It is not a weakly prime, because it can be changed into another prime (64320021839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160010929 + 32160010930.

It is an arithmetic number, because the mean of its divisors is an integer number (32160010930).

Almost surely, 2^64320021859 is an apocalyptic number.

64320021859 is a deficient number, since it is larger than the sum of its proper divisors (1).

64320021859 is an equidigital number, since it uses as much as digits as its factorization.

64320021859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 64320021859 in words is "sixty-four billion, three hundred twenty million, twenty-one thousand, eight hundred fifty-nine".