189431177142 has 32 divisors (see below), whose sum is σ = 381314304000. Its totient is φ = 62735431808.

The previous prime is 189431177083. The next prime is 189431177147. The reversal of 189431177142 is 241771134981.

It is a junction number, because it is equal to n+sod(n) for n = 189431177091 and 189431177100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189431177147) 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 15 ways as a sum of consecutive naturals, for example, 2088859 + ... + 2177657.

It is an arithmetic number, because the mean of its divisors is an integer number (11916072000).

Almost surely, 2^189431177142 is an apocalyptic number.

189431177142 is an abundant number, since it is smaller than the sum of its proper divisors (191883126858).

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

189431177142 is a wasteful number, since it uses less digits than its factorization.

189431177142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91100.

The product of its digits is 338688, while the sum is 48.

The spelling of 189431177142 in words is "one hundred eighty-nine billion, four hundred thirty-one million, one hundred seventy-seven thousand, one hundred forty-two".