65321918533 has 2 divisors, whose sum is σ = 65321918534. Its totient is φ = 65321918532.

The previous prime is 65321918531. The next prime is 65321918653. The reversal of 65321918533 is 33581912356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50860172484 + 14461746049 = 225522^2 + 120257^2 .

It is a cyclic number.

It is not a de Polignac number, because 65321918533 - 2¹ = 65321918531 is a prime.

Together with 65321918531, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65321918531) 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, 32660959266 + 32660959267.

It is an arithmetic number, because the mean of its divisors is an integer number (32660959267).

Almost surely, 2^65321918533 is an apocalyptic number.

It is an amenable number.

65321918533 is a deficient number, since it is larger than the sum of its proper divisors (1).

65321918533 is an equidigital number, since it uses as much as digits as its factorization.

65321918533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 46.

The spelling of 65321918533 in words is "sixty-five billion, three hundred twenty-one million, nine hundred eighteen thousand, five hundred thirty-three".