13663003565 has 8 divisors (see below), whose sum is σ = 16664385048. Its totient is φ = 10751215680.

The previous prime is 13663003489. The next prime is 13663003577. The reversal of 13663003565 is 56530036631.

It can be written as a sum of positive squares in 4 ways, for example, as 2162157001 + 11500846564 = 46499^2 + 107242^2 .

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

It is not a de Polignac number, because 13663003565 - 2¹⁰ = 13663002541 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 22398062 + ... + 22398671.

It is an arithmetic number, because the mean of its divisors is an integer number (2083048131).

Almost surely, 2^13663003565 is an apocalyptic number.

It is an amenable number.

13663003565 is a deficient number, since it is larger than the sum of its proper divisors (3001381483).

13663003565 is an equidigital number, since it uses as much as digits as its factorization.

13663003565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44796799.

The product of its (nonzero) digits is 145800, while the sum is 38.

The spelling of 13663003565 in words is "thirteen billion, six hundred sixty-three million, three thousand, five hundred sixty-five".