65830456278409 has 3 divisors (see below), whose sum is σ = 65830464392007. Its totient is φ = 65830448164812.

The previous prime is 65830456278403. The next prime is 65830456278437. The reversal of 65830456278409 is 90487265403856.

The square root of 65830456278409 is 8113597.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 430434405625 + 65400021872784 = 656075^2 + 8087028^2 .

It is not a de Polignac number, because 65830456278409 - 2¹⁹ = 65830455754121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65830456278403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4056799 + ... + 12170395.

It is an arithmetic number, because the mean of its divisors is an integer number (21943488130669).

Almost surely, 2^{65830456278409} is an apocalyptic number.

65830456278409 is the 8113597-th square number.

65830456278409 is the 4056799-th centered octagonal number.

It is an amenable number.

65830456278409 is a deficient number, since it is larger than the sum of its proper divisors (8113598).

65830456278409 is an frugal number, since it uses more digits than its factorization.

65830456278409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16227194 (or 8113597 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 67.

The spelling of 65830456278409 in words is "sixty-five trillion, eight hundred thirty billion, four hundred fifty-six million, two hundred seventy-eight thousand, four hundred nine".