64343763109 has 8 divisors (see below), whose sum is σ = 64669721688. Its totient is φ = 64018391040.

The previous prime is 64343763089. The next prime is 64343763161. The reversal of 64343763109 is 90136734346.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 47503510209 + 16840252900 = 217953^2 + 129770^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64343763109 - 2⁹ = 64343762597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64343763409) 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 in 7 ways as a sum of consecutive naturals, for example, 74179 + ... + 366319.

It is an arithmetic number, because the mean of its divisors is an integer number (8083715211).

Almost surely, 2^64343763109 is an apocalyptic number.

It is an amenable number.

64343763109 is a deficient number, since it is larger than the sum of its proper divisors (325958579).

64343763109 is a wasteful number, since it uses less digits than its factorization.

64343763109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293255.

The product of its (nonzero) digits is 979776, while the sum is 46.

The spelling of 64343763109 in words is "sixty-four billion, three hundred forty-three million, seven hundred sixty-three thousand, one hundred nine".