6521571713 has 2 divisors, whose sum is σ = 6521571714. Its totient is φ = 6521571712.

The previous prime is 6521571703. The next prime is 6521571769. The reversal of 6521571713 is 3171751256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4941668209 + 1579903504 = 70297^2 + 39748^2 .

It is a cyclic number.

It is not a de Polignac number, because 6521571713 - 2¹⁰ = 6521570689 is a prime.

It is not a weakly prime, because it can be changed into another prime (6521571703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260785856 + 3260785857.

It is an arithmetic number, because the mean of its divisors is an integer number (3260785857).

Almost surely, 2^6521571713 is an apocalyptic number.

It is an amenable number.

6521571713 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521571713 is an equidigital number, since it uses as much as digits as its factorization.

6521571713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 6521571713 is about 80756.2487551273. The cubic root of 6521571713 is about 1868.3178284707.

The spelling of 6521571713 in words is "six billion, five hundred twenty-one million, five hundred seventy-one thousand, seven hundred thirteen".