13444320221544 has 32 divisors (see below), whose sum is σ = 33644111616000. Its totient is φ = 4476998598912.

The previous prime is 13444320221539. The next prime is 13444320221617. The reversal of 13444320221544 is 44512202344431.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277567464 + ... + 277615895.

It is an arithmetic number, because the mean of its divisors is an integer number (1051378488000).

Almost surely, 2^{13444320221544} is an apocalyptic number.

It is an amenable number.

13444320221544 is an abundant number, since it is smaller than the sum of its proper divisors (20199791394456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13444320221544 is a wasteful number, since it uses less digits than its factorization.

13444320221544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555184377 (or 555184373 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 13444320221544 its reverse (44512202344431), we get a palindrome (57956522565975).

The spelling of 13444320221544 in words is "thirteen trillion, four hundred forty-four billion, three hundred twenty million, two hundred twenty-one thousand, five hundred forty-four".