13563320322445 has 16 divisors (see below), whose sum is σ = 16410034886400. Its totient is φ = 10761637670784.

The previous prime is 13563320322443. The next prime is 13563320322467. The reversal of 13563320322445 is 54422302336531.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13563320322445 - 2¹ = 13563320322443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13563320322443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21464089 + ... + 22086958.

It is an arithmetic number, because the mean of its divisors is an integer number (1025627180400).

Almost surely, 2^{13563320322445} is an apocalyptic number.

It is an amenable number.

13563320322445 is a deficient number, since it is larger than the sum of its proper divisors (2846714563955).

13563320322445 is a wasteful number, since it uses less digits than its factorization.

13563320322445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43551564.

The product of its (nonzero) digits is 1555200, while the sum is 43.

Adding to 13563320322445 its reverse (54422302336531), we get a palindrome (67985622658976).

The spelling of 13563320322445 in words is "thirteen trillion, five hundred sixty-three billion, three hundred twenty million, three hundred twenty-two thousand, four hundred forty-five".