9984570913871 has 4 divisors (see below), whose sum is σ = 10510074646200. Its totient is φ = 9459067181544.

The previous prime is 9984570913841. The next prime is 9984570913873. The reversal of 9984570913871 is 1783190754899.

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 9984570913871 - 2³⁸ = 9709693006927 is a prime.

It is a super-2 number, since 2×9984570913871² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9984570913795 and 9984570913804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9984570913873) 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, 262751866136 + ... + 262751866173.

It is an arithmetic number, because the mean of its divisors is an integer number (2627518661550).

Almost surely, 2^{9984570913871} is an apocalyptic number.

9984570913871 is a deficient number, since it is larger than the sum of its proper divisors (525503732329).

9984570913871 is a wasteful number, since it uses less digits than its factorization.

9984570913871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525503732328.

The product of its (nonzero) digits is 137168640, while the sum is 71.

The spelling of 9984570913871 in words is "nine trillion, nine hundred eighty-four billion, five hundred seventy million, nine hundred thirteen thousand, eight hundred seventy-one".