6506248871 has 4 divisors (see below), whose sum is σ = 6525905544. Its totient is φ = 6486592200.

The previous prime is 6506248841. The next prime is 6506248883. The reversal of 6506248871 is 1788426056.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6506248871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506248811) 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, 9827840 + ... + 9828501.

It is an arithmetic number, because the mean of its divisors is an integer number (1631476386).

Almost surely, 2^6506248871 is an apocalyptic number.

6506248871 is a deficient number, since it is larger than the sum of its proper divisors (19656673).

6506248871 is a wasteful number, since it uses less digits than its factorization.

6506248871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19656672.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 6506248871 is about 80661.3220261111. The cubic root of 6506248871 is about 1866.8534376504.

The spelling of 6506248871 in words is "six billion, five hundred six million, two hundred forty-eight thousand, eight hundred seventy-one".