189431177143 has 16 divisors (see below), whose sum is σ = 205985447136. Its totient is φ = 173167787520.

The previous prime is 189431177083. The next prime is 189431177147. The reversal of 189431177143 is 341771134981.

It is not a de Polignac number, because 189431177143 - 2³³ = 180841242551 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436371 + ... + 754507.

It is an arithmetic number, because the mean of its divisors is an integer number (12874090446).

Almost surely, 2^189431177143 is an apocalyptic number.

189431177143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

189431177143 is a deficient number, since it is larger than the sum of its proper divisors (16554269993).

189431177143 is a wasteful number, since it uses less digits than its factorization.

189431177143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318594.

The product of its digits is 508032, while the sum is 49.

The spelling of 189431177143 in words is "one hundred eighty-nine billion, four hundred thirty-one million, one hundred seventy-seven thousand, one hundred forty-three".