189745317888 has 192 divisors, whose sum is σ = 579638666880. Its totient is φ = 54071525376.

The previous prime is 189745317869. The next prime is 189745317889. The reversal of 189745317888 is 888713547981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (189745317889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17068620 + ... + 17079732.

It is an arithmetic number, because the mean of its divisors is an integer number (3018951390).

Almost surely, 2^189745317888 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 189745317888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289819333440).

189745317888 is an abundant number, since it is smaller than the sum of its proper divisors (389893348992).

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

189745317888 is a wasteful number, since it uses less digits than its factorization.

189745317888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11542 (or 11522 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 69.

The spelling of 189745317888 in words is "one hundred eighty-nine billion, seven hundred forty-five million, three hundred seventeen thousand, eight hundred eighty-eight".