193989866616 has 192 divisors, whose sum is σ = 664110283200. Its totient is φ = 49779339264.

The previous prime is 193989866611. The next prime is 193989866627. The reversal of 193989866616 is 616668989391.

193989866616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193989866611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157681 + ... + 642528.

It is an arithmetic number, because the mean of its divisors is an integer number (3458907725).

Almost surely, 2^193989866616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 193989866616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332055141600).

193989866616 is an abundant number, since it is smaller than the sum of its proper divisors (470120416584).

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

193989866616 is a wasteful number, since it uses less digits than its factorization.

193989866616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800278 (or 800271 counting only the distinct ones).

The product of its digits is 181398528, while the sum is 72.

The spelling of 193989866616 in words is "one hundred ninety-three billion, nine hundred eighty-nine million, eight hundred sixty-six thousand, six hundred sixteen".