13515128660711 has 4 divisors (see below), whose sum is σ = 13951100553024. Its totient is φ = 13079156768400.

The previous prime is 13515128660707. The next prime is 13515128660749. The reversal of 13515128660711 is 11706682151531.

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

It is a cyclic number.

It is not a de Polignac number, because 13515128660711 - 2² = 13515128660707 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13515128665711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217985946110 + ... + 217985946171.

It is an arithmetic number, because the mean of its divisors is an integer number (3487775138256).

Almost surely, 2^{13515128660711} is an apocalyptic number.

13515128660711 is a deficient number, since it is larger than the sum of its proper divisors (435971892313).

13515128660711 is an equidigital number, since it uses as much as digits as its factorization.

13515128660711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435971892312.

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 13515128660711 in words is "thirteen trillion, five hundred fifteen billion, one hundred twenty-eight million, six hundred sixty thousand, seven hundred eleven".