64384879109 has 2 divisors, whose sum is σ = 64384879110. Its totient is φ = 64384879108.

The previous prime is 64384879099. The next prime is 64384879121. The reversal of 64384879109 is 90197848346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63842128900 + 542750209 = 252670^2 + 23297^2 .

It is a cyclic number.

It is not a de Polignac number, because 64384879109 - 2⁸ = 64384878853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64384879129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32192439554 + 32192439555.

It is an arithmetic number, because the mean of its divisors is an integer number (32192439555).

Almost surely, 2^64384879109 is an apocalyptic number.

It is an amenable number.

64384879109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64384879109 is an equidigital number, since it uses as much as digits as its factorization.

64384879109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 64384879109 in words is "sixty-four billion, three hundred eighty-four million, eight hundred seventy-nine thousand, one hundred nine".