189878810530 has 8 divisors (see below), whose sum is σ = 341781858972. Its totient is φ = 75951524208.

The previous prime is 189878810507. The next prime is 189878810543. The reversal of 189878810530 is 35018878981.

189878810530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 189380762041 + 498048489 = 435179^2 + 22317^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9493940517 + ... + 9493940536.

Almost surely, 2^189878810530 is an apocalyptic number.

189878810530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189878810530 is a deficient number, since it is larger than the sum of its proper divisors (151903048442).

189878810530 is a wasteful number, since it uses less digits than its factorization.

189878810530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18987881060.

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 189878810530 in words is "one hundred eighty-nine billion, eight hundred seventy-eight million, eight hundred ten thousand, five hundred thirty".