13520245345 has 8 divisors (see below), whose sum is σ = 16260431400. Its totient is φ = 10792104960.

The previous prime is 13520245313. The next prime is 13520245379. The reversal of 13520245345 is 54354202531.

13520245345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5784515136 + 7735730209 = 76056^2 + 87953^2 .

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

It is not a de Polignac number, because 13520245345 - 2⁵ = 13520245313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13520245345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3008946 + ... + 3013435.

It is an arithmetic number, because the mean of its divisors is an integer number (2032553925).

Almost surely, 2^13520245345 is an apocalyptic number.

It is an amenable number.

13520245345 is a deficient number, since it is larger than the sum of its proper divisors (2740186055).

13520245345 is an equidigital number, since it uses as much as digits as its factorization.

13520245345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6022835.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 13520245345 its reverse (54354202531), we get a palindrome (67874447876).

The spelling of 13520245345 in words is "thirteen billion, five hundred twenty million, two hundred forty-five thousand, three hundred forty-five".