65385734809 has 4 divisors (see below), whose sum is σ = 66776920704. Its totient is φ = 63994548916.

The previous prime is 65385734803. The next prime is 65385734837. The reversal of 65385734809 is 90843758356.

65385734809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65385734809 - 2³ = 65385734801 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65385734801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695592877 + ... + 695592970.

It is an arithmetic number, because the mean of its divisors is an integer number (16694230176).

Almost surely, 2^65385734809 is an apocalyptic number.

It is an amenable number.

65385734809 is a deficient number, since it is larger than the sum of its proper divisors (1391185895).

65385734809 is a wasteful number, since it uses less digits than its factorization.

65385734809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391185894.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 65385734809 in words is "sixty-five billion, three hundred eighty-five million, seven hundred thirty-four thousand, eight hundred nine".