13505783345 has 4 divisors (see below), whose sum is σ = 16206940020. Its totient is φ = 10804626672.

The previous prime is 13505783311. The next prime is 13505783359. The reversal of 13505783345 is 54338750531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9597533089 + 3908250256 = 97967^2 + 62516^2 .

It is a cyclic number.

It is not a de Polignac number, because 13505783345 - 2²⁰ = 13504734769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13505783296 and 13505783305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350578330 + ... + 1350578339.

It is an arithmetic number, because the mean of its divisors is an integer number (4051735005).

Almost surely, 2^13505783345 is an apocalyptic number.

It is an amenable number.

13505783345 is a deficient number, since it is larger than the sum of its proper divisors (2701156675).

13505783345 is an equidigital number, since it uses as much as digits as its factorization.

13505783345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701156674.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 13505783345 in words is "thirteen billion, five hundred five million, seven hundred eighty-three thousand, three hundred forty-five".