985666218491136 has 864 divisors, whose sum is σ = 3438829428722688. Its totient is φ = 248123804221440.

The previous prime is 985666218491131. The next prime is 985666218491177. The reversal of 985666218491136 is 631194812666589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985666218491131) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1106650650 + ... + 1107540966.

Almost surely, 2^{985666218491136} is an apocalyptic number.

985666218491136 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 985666218491136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719414714361344).

985666218491136 is an abundant number, since it is smaller than the sum of its proper divisors (2453163210231552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

985666218491136 is a wasteful number, since it uses less digits than its factorization.

985666218491136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890467 (or 890446 counting only the distinct ones).

The product of its digits is 806215680, while the sum is 75.

The spelling of 985666218491136 in words is "nine hundred eighty-five trillion, six hundred sixty-six billion, two hundred eighteen million, four hundred ninety-one thousand, one hundred thirty-six".