13530621817 has 8 divisors (see below), whose sum is σ = 13718237120. Its totient is φ = 13344296400.

The previous prime is 13530621809. The next prime is 13530621893. The reversal of 13530621817 is 71812603531.

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

It is a cyclic number.

It is not a de Polignac number, because 13530621817 - 2³ = 13530621809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13530661817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301338 + ... + 343315.

It is an arithmetic number, because the mean of its divisors is an integer number (1714779640).

Almost surely, 2^13530621817 is an apocalyptic number.

It is an amenable number.

13530621817 is a deficient number, since it is larger than the sum of its proper divisors (187615303).

13530621817 is a wasteful number, since it uses less digits than its factorization.

13530621817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644943.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 13530621817 in words is "thirteen billion, five hundred thirty million, six hundred twenty-one thousand, eight hundred seventeen".