65340050689 has 3 divisors (see below), whose sum is σ = 65340306307. Its totient is φ = 65339795072.

The previous prime is 65340050669. The next prime is 65340050717. The reversal of 65340050689 is 98605004356.

The square root of 65340050689 is 255617.

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., 4601025 + 65335449664 = 2145^2 + 255608^2 .

It is not a de Polignac number, because 65340050689 - 2⁷ = 65340050561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65340050669) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 127809 + ... + 383425.

Almost surely, 2^65340050689 is an apocalyptic number.

65340050689 is the 255617-th square number.

65340050689 is the 127809-th centered octagonal number.

It is an amenable number.

65340050689 is a deficient number, since it is larger than the sum of its proper divisors (255618).

65340050689 is an frugal number, since it uses more digits than its factorization.

65340050689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511234 (or 255617 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 65340050689 in words is "sixty-five billion, three hundred forty million, fifty thousand, six hundred eighty-nine".