65393910389 has 2 divisors, whose sum is σ = 65393910390. Its totient is φ = 65393910388.

The previous prime is 65393910377. The next prime is 65393910403. The reversal of 65393910389 is 98301939356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54865098289 + 10528812100 = 234233^2 + 102610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65393910389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65393916389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32696955194 + 32696955195.

It is an arithmetic number, because the mean of its divisors is an integer number (32696955195).

Almost surely, 2^65393910389 is an apocalyptic number.

It is an amenable number.

65393910389 is a deficient number, since it is larger than the sum of its proper divisors (1).

65393910389 is an equidigital number, since it uses as much as digits as its factorization.

65393910389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4723920, while the sum is 56.

The spelling of 65393910389 in words is "sixty-five billion, three hundred ninety-three million, nine hundred ten thousand, three hundred eighty-nine".