13135257857 has 4 divisors (see below), whose sum is σ = 13223414100. Its totient is φ = 13047101616.

The previous prime is 13135257827. The next prime is 13135257881. The reversal of 13135257857 is 75875253131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75875253131 = 29 ⋅2616388039.

It can be written as a sum of positive squares in 2 ways, for example, as 1720258576 + 11414999281 = 41476^2 + 106841^2 .

It is a cyclic number.

It is not a de Polignac number, because 13135257857 - 2²⁰ = 13134209281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13135257827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44077898 + ... + 44078195.

It is an arithmetic number, because the mean of its divisors is an integer number (3305853525).

Almost surely, 2^13135257857 is an apocalyptic number.

It is an amenable number.

13135257857 is a deficient number, since it is larger than the sum of its proper divisors (88156243).

13135257857 is an equidigital number, since it uses as much as digits as its factorization.

13135257857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88156242.

The product of its digits is 882000, while the sum is 47.

The spelling of 13135257857 in words is "thirteen billion, one hundred thirty-five million, two hundred fifty-seven thousand, eight hundred fifty-seven".