189144457746 has 8 divisors (see below), whose sum is σ = 378288915504. Its totient is φ = 63048152580.

The previous prime is 189144457613. The next prime is 189144457793. The reversal of 189144457746 is 647754441981.

It is a sphenic number, since it is the product of 3 distinct primes.

189144457746 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189144457746.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15762038140 + ... + 15762038151.

It is an arithmetic number, because the mean of its divisors is an integer number (47286114438).

Almost surely, 2^189144457746 is an apocalyptic number.

189144457746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

189144457746 is a wasteful number, since it uses less digits than its factorization.

189144457746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31524076296.

The product of its digits is 27095040, while the sum is 60.

The spelling of 189144457746 in words is "one hundred eighty-nine billion, one hundred forty-four million, four hundred fifty-seven thousand, seven hundred forty-six".