9876544321 has 12 divisors (see below), whose sum is σ = 11491232832. Its totient is φ = 8463994728.

The previous prime is 9876544319. The next prime is 9876544351. The reversal of 9876544321 is 1234456789.

It is a happy number.

It is not a de Polignac number, because 9876544321 - 2¹ = 9876544319 is a prime.

It is a super-2 number, since 2×9876544321² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9876544351) 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 11 ways as a sum of consecutive naturals, for example, 290796 + ... + 322978.

It is an arithmetic number, because the mean of its divisors is an integer number (957602736).

Almost surely, 2^9876544321 is an apocalyptic number.

It is an amenable number.

9876544321 is a deficient number, since it is larger than the sum of its proper divisors (1614688511).

9876544321 is a wasteful number, since it uses less digits than its factorization.

9876544321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38460 (or 38453 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 9876544321 is about 99380.8045902226. The cubic root of 9876544321 is about 2145.5320462486.

The spelling of 9876544321 in words is "nine billion, eight hundred seventy-six million, five hundred forty-four thousand, three hundred twenty-one".