13105445132513 has 4 divisors (see below), whose sum is σ = 13201105316100. Its totient is φ = 13009784948928.

The previous prime is 13105445132491. The next prime is 13105445132539. The reversal of 13105445132513 is 31523154450131.

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 2571863312209 + 10533581820304 = 1603703^2 + 3245548^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13105445132513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13105445132573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47830091588 + ... + 47830091861.

It is an arithmetic number, because the mean of its divisors is an integer number (3300276329025).

Almost surely, 2^{13105445132513} is an apocalyptic number.

It is an amenable number.

13105445132513 is a deficient number, since it is larger than the sum of its proper divisors (95660183587).

13105445132513 is an equidigital number, since it uses as much as digits as its factorization.

13105445132513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95660183586.

The product of its (nonzero) digits is 108000, while the sum is 38.

Adding to 13105445132513 its reverse (31523154450131), we get a palindrome (44628599582644).

The spelling of 13105445132513 in words is "thirteen trillion, one hundred five billion, four hundred forty-five million, one hundred thirty-two thousand, five hundred thirteen".