13508688747 has 4 divisors (see below), whose sum is σ = 18011585000. Its totient is φ = 9005792496.

The previous prime is 13508688667. The next prime is 13508688751. The reversal of 13508688747 is 74788680531.

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

It is not a de Polignac number, because 13508688747 - 2²⁰ = 13507640171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13508688797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251448122 + ... + 2251448127.

It is an arithmetic number, because the mean of its divisors is an integer number (4502896250).

Almost surely, 2^13508688747 is an apocalyptic number.

13508688747 is a deficient number, since it is larger than the sum of its proper divisors (4502896253).

13508688747 is an equidigital number, since it uses as much as digits as its factorization.

13508688747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502896252.

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 13508688747 in words is "thirteen billion, five hundred eight million, six hundred eighty-eight thousand, seven hundred forty-seven".