13512513505 has 16 divisors (see below), whose sum is σ = 16626240144. Its totient is φ = 10538461440.

The previous prime is 13512513493. The next prime is 13512513571. The reversal of 13512513505 is 50531521531.

13512513505 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 8 ways, for example, as 567535329 + 12944978176 = 23823^2 + 113776^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13512513505 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 120786 + ... + 203995.

It is an arithmetic number, because the mean of its divisors is an integer number (1039140009).

Almost surely, 2^13512513505 is an apocalyptic number.

It is an amenable number.

13512513505 is a deficient number, since it is larger than the sum of its proper divisors (3113726639).

13512513505 is a wasteful number, since it uses less digits than its factorization.

13512513505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324996.

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 13512513505 in words is "thirteen billion, five hundred twelve million, five hundred thirteen thousand, five hundred five".