13440450134455 has 4 divisors (see below), whose sum is σ = 16128540161352. Its totient is φ = 10752360107560.

The previous prime is 13440450134273. The next prime is 13440450134467. The reversal of 13440450134455 is 55443105404431.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-13440450134455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344045013441 + ... + 1344045013450.

It is an arithmetic number, because the mean of its divisors is an integer number (4032135040338).

Almost surely, 2^{13440450134455} is an apocalyptic number.

13440450134455 is a deficient number, since it is larger than the sum of its proper divisors (2688090026897).

13440450134455 is an equidigital number, since it uses as much as digits as its factorization.

13440450134455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688090026896.

The product of its (nonzero) digits is 1152000, while the sum is 43.

Adding to 13440450134455 its reverse (55443105404431), we get a palindrome (68883555538886).

The spelling of 13440450134455 in words is "thirteen trillion, four hundred forty billion, four hundred fifty million, one hundred thirty-four thousand, four hundred fifty-five".