65803784513 has 4 divisors (see below), whose sum is σ = 65804411328. Its totient is φ = 65803157700.

The previous prime is 65803784491. The next prime is 65803784521. The reversal of 65803784513 is 31548730856.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65803784513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65803784533) 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, 113381 + ... + 380082.

It is an arithmetic number, because the mean of its divisors is an integer number (16451102832).

Almost surely, 2^65803784513 is an apocalyptic number.

It is an amenable number.

65803784513 is a deficient number, since it is larger than the sum of its proper divisors (626815).

65803784513 is a wasteful number, since it uses less digits than its factorization.

65803784513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626814.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 65803784513 in words is "sixty-five billion, eight hundred three million, seven hundred eighty-four thousand, five hundred thirteen".