13305616405 has 8 divisors (see below), whose sum is σ = 15967587384. Its totient is φ = 10643928000.

The previous prime is 13305616397. The next prime is 13305616409. The reversal of 13305616405 is 50461650331.

It can be written as a sum of positive squares in 4 ways, for example, as 1262309841 + 12043306564 = 35529^2 + 109742^2 .

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

It is not a de Polignac number, because 13305616405 - 2³ = 13305616397 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 (13305616409) 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, 52455 + ... + 171355.

It is an arithmetic number, because the mean of its divisors is an integer number (1995948423).

Almost surely, 2^13305616405 is an apocalyptic number.

It is an amenable number.

13305616405 is a deficient number, since it is larger than the sum of its proper divisors (2661970979).

13305616405 is a wasteful number, since it uses less digits than its factorization.

13305616405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141287.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 13305616405 in words is "thirteen billion, three hundred five million, six hundred sixteen thousand, four hundred five".