9871605880 has 32 divisors (see below), whose sum is σ = 22460684400. Its totient is φ = 3904274176.

The previous prime is 9871605859. The next prime is 9871605889. The reversal of 9871605880 is 885061789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9871605889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1382902 + ... + 1390021.

Almost surely, 2^9871605880 is an apocalyptic number.

It is an amenable number.

9871605880 is an abundant number, since it is smaller than the sum of its proper divisors (12589078520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9871605880 is a wasteful number, since it uses less digits than its factorization.

9871605880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773023 (or 2773019 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 9871605880 is about 99355.9554329785. The cubic root of 9871605880 is about 2145.1743857295.

The spelling of 9871605880 in words is "nine billion, eight hundred seventy-one million, six hundred five thousand, eight hundred eighty".