989159783997 has 128 divisors (see below), whose sum is σ = 1789015818240. Its totient is φ = 470698525440.

The previous prime is 989159783951. The next prime is 989159784017. The reversal of 989159783997 is 799387951989.

It is not a de Polignac number, because 989159783997 - 2¹⁰ = 989159782973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989159783947) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17092603 + ... + 17150375.

It is an arithmetic number, because the mean of its divisors is an integer number (13976686080).

Almost surely, 2^989159783997 is an apocalyptic number.

It is an amenable number.

989159783997 is a deficient number, since it is larger than the sum of its proper divisors (799856034243).

989159783997 is a wasteful number, since it uses less digits than its factorization.

989159783997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57943.

The product of its digits is 2777664960, while the sum is 84.

The spelling of 989159783997 in words is "nine hundred eighty-nine billion, one hundred fifty-nine million, seven hundred eighty-three thousand, nine hundred ninety-seven".