13444451453521 has 8 divisors (see below), whose sum is σ = 14666809796064. Its totient is φ = 12222115691520.

The previous prime is 13444451453513. The next prime is 13444451453557. The reversal of 13444451453521 is 12535415444431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13444451453521 - 2³ = 13444451453513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13444451453621) 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 7 ways as a sum of consecutive naturals, for example, 4388031 + ... + 6792916.

It is an arithmetic number, because the mean of its divisors is an integer number (1833351224508).

Almost surely, 2^{13444451453521} is an apocalyptic number.

13444451453521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13444451453521 is a deficient number, since it is larger than the sum of its proper divisors (1222358342543).

13444451453521 is a wasteful number, since it uses less digits than its factorization.

13444451453521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11290271.

The product of its digits is 2304000, while the sum is 46.

Adding to 13444451453521 its reverse (12535415444431), we get a palindrome (25979866897952).

The spelling of 13444451453521 in words is "thirteen trillion, four hundred forty-four billion, four hundred fifty-one million, four hundred fifty-three thousand, five hundred twenty-one".