64321065943 has 2 divisors, whose sum is σ = 64321065944. Its totient is φ = 64321065942.

The previous prime is 64321065929. The next prime is 64321065971. The reversal of 64321065943 is 34956012346.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64321065943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64321065943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64321065983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160532971 + 32160532972.

It is an arithmetic number, because the mean of its divisors is an integer number (32160532972).

Almost surely, 2^64321065943 is an apocalyptic number.

64321065943 is a deficient number, since it is larger than the sum of its proper divisors (1).

64321065943 is an equidigital number, since it uses as much as digits as its factorization.

64321065943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 64321065943 in words is "sixty-four billion, three hundred twenty-one million, sixty-five thousand, nine hundred forty-three".