13521340663 has 4 divisors (see below), whose sum is σ = 13521605760. Its totient is φ = 13521075568.

The previous prime is 13521340627. The next prime is 13521340681. The reversal of 13521340663 is 36604312531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13521340663 - 2¹⁷ = 13521209591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13521340603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29158 + ... + 167011.

It is an arithmetic number, because the mean of its divisors is an integer number (3380401440).

Almost surely, 2^13521340663 is an apocalyptic number.

13521340663 is a deficient number, since it is larger than the sum of its proper divisors (265097).

13521340663 is an equidigital number, since it uses as much as digits as its factorization.

13521340663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265096.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 13521340663 in words is "thirteen billion, five hundred twenty-one million, three hundred forty thousand, six hundred sixty-three".