13563445275399 has 16 divisors (see below), whose sum is σ = 18602051364864. Its totient is φ = 8785769966400.

The previous prime is 13563445275383. The next prime is 13563445275431. The reversal of 13563445275399 is 99357254436531.

It is a happy number.

It is not a de Polignac number, because 13563445275399 - 2⁴ = 13563445275383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13563445277399) 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, 275218782 + ... + 275268059.

It is an arithmetic number, because the mean of its divisors is an integer number (1162628210304).

Almost surely, 2^{13563445275399} is an apocalyptic number.

13563445275399 is a deficient number, since it is larger than the sum of its proper divisors (5038606089465).

13563445275399 is a wasteful number, since it uses less digits than its factorization.

13563445275399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550487078.

The product of its digits is 367416000, while the sum is 66.

The spelling of 13563445275399 in words is "thirteen trillion, five hundred sixty-three billion, four hundred forty-five million, two hundred seventy-five thousand, three hundred ninety-nine".