13665534123253 has 2 divisors, whose sum is σ = 13665534123254. Its totient is φ = 13665534123252.

The previous prime is 13665534123251. The next prime is 13665534123341. The reversal of 13665534123253 is 35232143556631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13589965212849 + 75568910404 = 3686457^2 + 274898^2 .

It is a cyclic number.

It is not a de Polignac number, because 13665534123253 - 2¹ = 13665534123251 is a prime.

Together with 13665534123251, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13665534123197 and 13665534123206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13665534123251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832767061626 + 6832767061627.

It is an arithmetic number, because the mean of its divisors is an integer number (6832767061627).

Almost surely, 2^{13665534123253} is an apocalyptic number.

It is an amenable number.

13665534123253 is a deficient number, since it is larger than the sum of its proper divisors (1).

13665534123253 is an equidigital number, since it uses as much as digits as its factorization.

13665534123253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 49.

Adding to 13665534123253 its reverse (35232143556631), we get a palindrome (48897677679884).

The spelling of 13665534123253 in words is "thirteen trillion, six hundred sixty-five billion, five hundred thirty-four million, one hundred twenty-three thousand, two hundred fifty-three".