6505250513 has 4 divisors (see below), whose sum is σ = 6506534400. Its totient is φ = 6503966628.

The previous prime is 6505250509. The next prime is 6505250539. The reversal of 6505250513 is 3150525056.

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 6505250513 - 2² = 6505250509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6505250513.

It is not an unprimeable number, because it can be changed into a prime (6505250573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634313 + ... + 644486.

It is an arithmetic number, because the mean of its divisors is an integer number (1626633600).

Almost surely, 2^6505250513 is an apocalyptic number.

It is an amenable number.

6505250513 is a deficient number, since it is larger than the sum of its proper divisors (1283887).

6505250513 is a wasteful number, since it uses less digits than its factorization.

6505250513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283886.

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 6505250513 is about 80655.1332092385. The cubic root of 6505250513 is about 1866.7579456888.

Adding to 6505250513 its reverse (3150525056), we get a palindrome (9655775569).

The spelling of 6505250513 in words is "six billion, five hundred five million, two hundred fifty thousand, five hundred thirteen".