189914551209 has 48 divisors (see below), whose sum is σ = 290179448832. Its totient is φ = 124097693328.

The previous prime is 189914551171. The next prime is 189914551279. The reversal of 189914551209 is 902155419981.

189914551209 is a `hidden beast` number, since 1 + 89 + 9 + 1 + 4 + 551 + 2 + 0 + 9 = 666.

189914551209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189914551209 - 2¹⁵ = 189914518441 is a prime.

It is a super-4 number, since 4×189914551209⁴ (a number of 46 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (189914551279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2524392 + ... + 2598534.

It is an arithmetic number, because the mean of its divisors is an integer number (6045405184).

Almost surely, 2^189914551209 is an apocalyptic number.

It is an amenable number.

189914551209 is a deficient number, since it is larger than the sum of its proper divisors (100264897623).

189914551209 is an equidigital number, since it uses as much as digits as its factorization.

189914551209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74368 (or 74356 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The spelling of 189914551209 in words is "one hundred eighty-nine billion, nine hundred fourteen million, five hundred fifty-one thousand, two hundred nine".