9987581247113 has 4 divisors (see below), whose sum is σ = 9987693564948. Its totient is φ = 9987468929280.

The previous prime is 9987581247101. The next prime is 9987581247209. The reversal of 9987581247113 is 3117421857899.

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 9773645396089 + 213935851024 = 3126283^2 + 462532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9987581247113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9987581247113.

It is not an unprimeable number, because it can be changed into a prime (9987581217113) 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, 56025428 + ... + 56203413.

It is an arithmetic number, because the mean of its divisors is an integer number (2496923391237).

Almost surely, 2^{9987581247113} is an apocalyptic number.

It is an amenable number.

9987581247113 is a deficient number, since it is larger than the sum of its proper divisors (112317835).

9987581247113 is a wasteful number, since it uses less digits than its factorization.

9987581247113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112317834.

The product of its digits is 30481920, while the sum is 65.

The spelling of 9987581247113 in words is "nine trillion, nine hundred eighty-seven billion, five hundred eighty-one million, two hundred forty-seven thousand, one hundred thirteen".