6505868725 has 12 divisors (see below), whose sum is σ = 8264041380. Its totient is φ = 5077750400.

The previous prime is 6505868683. The next prime is 6505868731. The reversal of 6505868725 is 5278685056.

It can be written as a sum of positive squares in 6 ways, for example, as 89378116 + 6416490609 = 9454^2 + 80103^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6505868725 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3172570 + ... + 3174619.

It is an arithmetic number, because the mean of its divisors is an integer number (688670115).

Almost surely, 2^6505868725 is an apocalyptic number.

It is an amenable number.

6505868725 is a deficient number, since it is larger than the sum of its proper divisors (1758172655).

6505868725 is a wasteful number, since it uses less digits than its factorization.

6505868725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347240 (or 6347235 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 52.

The square root of 6505868725 is about 80658.9655587028. The cubic root of 6505868725 is about 1866.8170782108.

The spelling of 6505868725 in words is "six billion, five hundred five million, eight hundred sixty-eight thousand, seven hundred twenty-five".