65164439453 has 2 divisors, whose sum is σ = 65164439454. Its totient is φ = 65164439452.

The previous prime is 65164439449. The next prime is 65164439513. The reversal of 65164439453 is 35493446156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58497227044 + 6667212409 = 241862^2 + 81653^2 .

It is a cyclic number.

It is not a de Polignac number, because 65164439453 - 2² = 65164439449 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 (65164439653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32582219726 + 32582219727.

It is an arithmetic number, because the mean of its divisors is an integer number (32582219727).

Almost surely, 2^65164439453 is an apocalyptic number.

It is an amenable number.

65164439453 is a deficient number, since it is larger than the sum of its proper divisors (1).

65164439453 is an equidigital number, since it uses as much as digits as its factorization.

65164439453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The spelling of 65164439453 in words is "sixty-five billion, one hundred sixty-four million, four hundred thirty-nine thousand, four hundred fifty-three".