987844448789 has 24 divisors (see below), whose sum is σ = 1141671174336. Its totient is φ = 852437643200.

The previous prime is 987844448777. The next prime is 987844448821.

987844448789 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-987844448789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987844442789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 990224 + ... + 1719369.

It is an arithmetic number, because the mean of its divisors is an integer number (47569632264).

Almost surely, 2^987844448789 is an apocalyptic number.

It is an amenable number.

987844448789 is a deficient number, since it is larger than the sum of its proper divisors (153826725547).

987844448789 is a wasteful number, since it uses less digits than its factorization.

987844448789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709769 (or 2709758 counting only the distinct ones).

The product of its digits is 4161798144, while the sum is 80.

The spelling of 987844448789 in words is "nine hundred eighty-seven billion, eight hundred forty-four million, four hundred forty-eight thousand, seven hundred eighty-nine".