9871500000 has 168 divisors, whose sum is σ = 32395366584. Its totient is φ = 2632000000.

The previous prime is 9871499999. The next prime is 9871500017. The reversal of 9871500000 is 51789.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 1496710 + ... + 1503290.

It is an arithmetic number, because the mean of its divisors is an integer number (192829563).

Almost surely, 2^9871500000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9871500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16197683292).

9871500000 is an abundant number, since it is smaller than the sum of its proper divisors (22523866584).

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

9871500000 is an frugal number, since it uses more digits than its factorization.

9871500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6591 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 9871500000 is about 99355.4225998762. The cubic root of 9871500000 is about 2145.1667161947.

Adding to 9871500000 its reverse (51789), we get a palindrome (9871551789).

The spelling of 9871500000 in words is "nine billion, eight hundred seventy-one million, five hundred thousand".