987445544789 has 8 divisors (see below), whose sum is σ = 1077461751168. Its totient is φ = 897470743360.

The previous prime is 987445544779. The next prime is 987445544803.

987445544789 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987445544789 - 2¹⁶ = 987445479253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987445544779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10301357 + ... + 10396770.

It is an arithmetic number, because the mean of its divisors is an integer number (134682718896).

Almost surely, 2^987445544789 is an apocalyptic number.

It is an amenable number.

987445544789 is a deficient number, since it is larger than the sum of its proper divisors (90016206379).

987445544789 is a wasteful number, since it uses less digits than its factorization.

987445544789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20702475.

The product of its digits is 1625702400, while the sum is 74.

The spelling of 987445544789 in words is "nine hundred eighty-seven billion, four hundred forty-five million, five hundred forty-four thousand, seven hundred eighty-nine".