189909746104321 has 4 divisors (see below), whose sum is σ = 189970634131200. Its totient is φ = 189848858077444.

The previous prime is 189909746104319. The next prime is 189909746104343. The reversal of 189909746104321 is 123401647909981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189909746104321 - 2¹ = 189909746104319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189909746104381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30444008761 + ... + 30444014998.

It is an arithmetic number, because the mean of its divisors is an integer number (47492658532800).

Almost surely, 2^{189909746104321} is an apocalyptic number.

It is an amenable number.

189909746104321 is a deficient number, since it is larger than the sum of its proper divisors (60888026879).

189909746104321 is an equidigital number, since it uses as much as digits as its factorization.

189909746104321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60888026878.

The product of its (nonzero) digits is 23514624, while the sum is 64.

The spelling of 189909746104321 in words is "one hundred eighty-nine trillion, nine hundred nine billion, seven hundred forty-six million, one hundred four thousand, three hundred twenty-one".