6513856171 has 2 divisors, whose sum is σ = 6513856172. Its totient is φ = 6513856170.

The previous prime is 6513856157. The next prime is 6513856189. The reversal of 6513856171 is 1716583156.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6513856171 - 2⁷ = 6513856043 is a prime.

It is not a weakly prime, because it can be changed into another prime (6513856471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3256928085 + 3256928086.

It is an arithmetic number, because the mean of its divisors is an integer number (3256928086).

Almost surely, 2^6513856171 is an apocalyptic number.

6513856171 is a deficient number, since it is larger than the sum of its proper divisors (1).

6513856171 is an equidigital number, since it uses as much as digits as its factorization.

6513856171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 6513856171 is about 80708.4640604689. The cubic root of 6513856171 is about 1867.5807478106.

The spelling of 6513856171 in words is "six billion, five hundred thirteen million, eight hundred fifty-six thousand, one hundred seventy-one".