13502345520145 has 4 divisors (see below), whose sum is σ = 16202814624180. Its totient is φ = 10801876416112.

The previous prime is 13502345520121. The next prime is 13502345520151. The reversal of 13502345520145 is 54102554320531.

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 6353631050881 + 7148714469264 = 2520641^2 + 2673708^2 .

It is a cyclic number.

It is not a de Polignac number, because 13502345520145 - 2¹⁹ = 13502344995857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13502345520098 and 13502345520107.

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, 1350234552010 + ... + 1350234552019.

It is an arithmetic number, because the mean of its divisors is an integer number (4050703656045).

Almost surely, 2^{13502345520145} is an apocalyptic number.

It is an amenable number.

13502345520145 is a deficient number, since it is larger than the sum of its proper divisors (2700469104035).

13502345520145 is an equidigital number, since it uses as much as digits as its factorization.

13502345520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700469104034.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 13502345520145 its reverse (54102554320531), we get a palindrome (67604899840676).

The spelling of 13502345520145 in words is "thirteen trillion, five hundred two billion, three hundred forty-five million, five hundred twenty thousand, one hundred forty-five".