13455216444451 has 4 divisors (see below), whose sum is σ = 13461626745000. Its totient is φ = 13448806143904.

The previous prime is 13455216444443. The next prime is 13455216444473. The reversal of 13455216444451 is 15444461255431.

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

It is a cyclic number.

It is not a de Polignac number, because 13455216444451 - 2³ = 13455216444443 is a prime.

It is a super-2 number, since 2×13455216444451² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13455216444395 and 13455216444404.

It is not an unprimeable number, because it can be changed into a prime (13455216448451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3205147126 + ... + 3205151323.

It is an arithmetic number, because the mean of its divisors is an integer number (3365406686250).

Almost surely, 2^{13455216444451} is an apocalyptic number.

13455216444451 is a deficient number, since it is larger than the sum of its proper divisors (6410300549).

13455216444451 is an equidigital number, since it uses as much as digits as its factorization.

13455216444451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410300548.

The product of its digits is 4608000, while the sum is 49.

Adding to 13455216444451 its reverse (15444461255431), we get a palindrome (28899677699882).

The spelling of 13455216444451 in words is "thirteen trillion, four hundred fifty-five billion, two hundred sixteen million, four hundred forty-four thousand, four hundred fifty-one".