189543068640 has 72 divisors (see below), whose sum is σ = 646815726648. Its totient is φ = 50544817920.

The previous prime is 189543068629. The next prime is 189543068683. The reversal of 189543068640 is 46860345981.

189543068640 is a `hidden beast` number, since 1 + 8 + 95 + 430 + 6 + 86 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65812126 + ... + 65815005.

It is an arithmetic number, because the mean of its divisors is an integer number (8983551759).

Almost surely, 2^189543068640 is an apocalyptic number.

189543068640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189543068640 is an abundant number, since it is smaller than the sum of its proper divisors (457272658008).

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

189543068640 is a wasteful number, since it uses less digits than its factorization.

189543068640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131627152 (or 131627141 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 189543068640 in words is "one hundred eighty-nine billion, five hundred forty-three million, sixty-eight thousand, six hundred forty".