189827320542 has 32 divisors (see below), whose sum is σ = 388823057952. Its totient is φ = 61765576704.

The previous prime is 189827320499. The next prime is 189827320637. The reversal of 189827320542 is 245023728981.

189827320542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2191513 + ... + 2276484.

It is an arithmetic number, because the mean of its divisors is an integer number (12150720561).

Almost surely, 2^189827320542 is an apocalyptic number.

189827320542 is an abundant number, since it is smaller than the sum of its proper divisors (198995737410).

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

189827320542 is a wasteful number, since it uses less digits than its factorization.

189827320542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468172.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 189827320542 in words is "one hundred eighty-nine billion, eight hundred twenty-seven million, three hundred twenty thousand, five hundred forty-two".