189105684480 has 300 divisors, whose sum is σ = 677981997000. Its totient is φ = 50426413056.

The previous prime is 189105684389. The next prime is 189105684491. The reversal of 189105684480 is 84486501981.

It is a happy number.

189105684480 is a `hidden beast` number, since 1 + 89 + 1 + 0 + 5 + 6 + 84 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6621271 + ... + 6649769.

It is an arithmetic number, because the mean of its divisors is an integer number (2259939990).

Almost surely, 2^189105684480 is an apocalyptic number.

189105684480 is a gapful number since it is divisible by the number (10) 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 189105684480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338990998500).

189105684480 is an abundant number, since it is smaller than the sum of its proper divisors (488876312520).

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

189105684480 is an frugal number, since it uses more digits than its factorization.

189105684480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28544 (or 28509 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 189105684480 in words is "one hundred eighty-nine billion, one hundred five million, six hundred eighty-four thousand, four hundred eighty".