13571319857 has 2 divisors, whose sum is σ = 13571319858. Its totient is φ = 13571319856.

The previous prime is 13571319847. The next prime is 13571319859. The reversal of 13571319857 is 75891317531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13566658576 + 4661281 = 116476^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 13571319857 - 2²⁸ = 13302884401 is a prime.

It is a super-2 number, since 2×13571319857² (a number of 21 digits) contains 22 as substring.

Together with 13571319859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13571319859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6785659928 + 6785659929.

It is an arithmetic number, because the mean of its divisors is an integer number (6785659929).

Almost surely, 2^13571319857 is an apocalyptic number.

It is an amenable number.

13571319857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13571319857 is an equidigital number, since it uses as much as digits as its factorization.

13571319857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 50.

The spelling of 13571319857 in words is "thirteen billion, five hundred seventy-one million, three hundred nineteen thousand, eight hundred fifty-seven".