6500248509 has 4 divisors (see below), whose sum is σ = 8666998016. Its totient is φ = 4333499004.

The previous prime is 6500248483. The next prime is 6500248561. The reversal of 6500248509 is 9058420056.

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 not a de Polignac number, because 6500248509 - 2⁹ = 6500247997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6500248309) 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, 1083374749 + ... + 1083374754.

It is an arithmetic number, because the mean of its divisors is an integer number (2166749504).

Almost surely, 2^6500248509 is an apocalyptic number.

It is an amenable number.

6500248509 is a deficient number, since it is larger than the sum of its proper divisors (2166749507).

6500248509 is a wasteful number, since it uses less digits than its factorization.

6500248509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166749506.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 6500248509 is about 80624.1186556480. The cubic root of 6500248509 is about 1866.2793617623.

The spelling of 6500248509 in words is "six billion, five hundred million, two hundred forty-eight thousand, five hundred nine".