13136503565 has 4 divisors (see below), whose sum is σ = 15763804284. Its totient is φ = 10509202848.

The previous prime is 13136503561. The next prime is 13136503579. The reversal of 13136503565 is 56530563131.

It is a happy number.

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 3555617641 + 9580885924 = 59629^2 + 97882^2 .

It is a cyclic number.

It is not a de Polignac number, because 13136503565 - 2² = 13136503561 is a prime.

It is a super-3 number, since 3×13136503565³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13136503561) 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, 1313650352 + ... + 1313650361.

It is an arithmetic number, because the mean of its divisors is an integer number (3940951071).

Almost surely, 2^13136503565 is an apocalyptic number.

It is an amenable number.

13136503565 is a deficient number, since it is larger than the sum of its proper divisors (2627300719).

13136503565 is an equidigital number, since it uses as much as digits as its factorization.

13136503565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627300718.

The product of its (nonzero) digits is 121500, while the sum is 38.

The spelling of 13136503565 in words is "thirteen billion, one hundred thirty-six million, five hundred three thousand, five hundred sixty-five".