189450450305 has 8 divisors (see below), whose sum is σ = 229894929000. Its totient is φ = 149857434496.

The previous prime is 189450450223. The next prime is 189450450311. The reversal of 189450450305 is 503054054981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2044577089 + 187405873216 = 45217^2 + 432904^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189450450305 - 2²⁴ = 189433673089 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212865230 + ... + 212866119.

It is an arithmetic number, because the mean of its divisors is an integer number (28736866125).

Almost surely, 2^189450450305 is an apocalyptic number.

It is an amenable number.

189450450305 is a deficient number, since it is larger than the sum of its proper divisors (40444478695).

189450450305 is an equidigital number, since it uses as much as digits as its factorization.

189450450305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425731443.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 189450450305 in words is "one hundred eighty-nine billion, four hundred fifty million, four hundred fifty thousand, three hundred five".