6539519317 has 4 divisors (see below), whose sum is σ = 6539691340. Its totient is φ = 6539347296.

The previous prime is 6539519297. The next prime is 6539519333. The reversal of 6539519317 is 7139159356.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2407472356 + 4132046961 = 49066^2 + 64281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6539519317 is a prime.

It is a super-2 number, since 2×6539519317² = 85530625794832292978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539519017) 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, 942 + ... + 114367.

It is an arithmetic number, because the mean of its divisors is an integer number (1634922835).

Almost surely, 2^6539519317 is an apocalyptic number.

It is an amenable number.

6539519317 is a deficient number, since it is larger than the sum of its proper divisors (172023).

6539519317 is a wasteful number, since it uses less digits than its factorization.

6539519317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172022.

The product of its digits is 765450, while the sum is 49.

The square root of 6539519317 is about 80867.2944829985. The cubic root of 6539519317 is about 1870.0301516486.

The spelling of 6539519317 in words is "six billion, five hundred thirty-nine million, five hundred nineteen thousand, three hundred seventeen".