6516385529 has 4 divisors (see below), whose sum is σ = 6521989776. Its totient is φ = 6510781284.

The previous prime is 6516385517. The next prime is 6516385543. The reversal of 6516385529 is 9255836156.

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 6516385529 - 2¹⁶ = 6516319993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6516385229) 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, 2800379 + ... + 2802704.

It is an arithmetic number, because the mean of its divisors is an integer number (1630497444).

Almost surely, 2^6516385529 is an apocalyptic number.

It is an amenable number.

6516385529 is a deficient number, since it is larger than the sum of its proper divisors (5604247).

6516385529 is a wasteful number, since it uses less digits than its factorization.

6516385529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604246.

The product of its digits is 1944000, while the sum is 50.

The square root of 6516385529 is about 80724.1322591950. The cubic root of 6516385529 is about 1867.8224463730.

The spelling of 6516385529 in words is "six billion, five hundred sixteen million, three hundred eighty-five thousand, five hundred twenty-nine".