987659956789 has 24 divisors (see below), whose sum is σ = 1155055572000. Its totient is φ = 837303540480.

The previous prime is 987659956783. The next prime is 987659956831.

987659956789 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 987659956789 - 2²⁷ = 987525739061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987659956783) 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, 1078639 + ... + 1771660.

It is an arithmetic number, because the mean of its divisors is an integer number (48127315500).

Almost surely, 2^987659956789 is an apocalyptic number.

It is an amenable number.

987659956789 is a deficient number, since it is larger than the sum of its proper divisors (167395615211).

987659956789 is a wasteful number, since it uses less digits than its factorization.

987659956789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850453 (or 2850436 counting only the distinct ones).

The product of its digits is 18517766400, while the sum is 88.

The spelling of 987659956789 in words is "nine hundred eighty-seven billion, six hundred fifty-nine million, nine hundred fifty-six thousand, seven hundred eighty-nine".