168234143138 has 8 divisors (see below), whose sum is σ = 257720389632. Its totient is φ = 82327346596.

The previous prime is 168234143137. The next prime is 168234143197. The reversal of 168234143138 is 831341432861.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (168234143137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 894862370 + ... + 894862557.

It is an arithmetic number, because the mean of its divisors is an integer number (32215048704).

Almost surely, 2^168234143138 is an apocalyptic number.

168234143138 is a deficient number, since it is larger than the sum of its proper divisors (89486246494).

168234143138 is a wasteful number, since it uses less digits than its factorization.

168234143138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789724976.

The product of its digits is 331776, while the sum is 44.

Adding to 168234143138 its reverse (831341432861), we get a palindrome (999575575999).

The spelling of 168234143138 in words is "one hundred sixty-eight billion, two hundred thirty-four million, one hundred forty-three thousand, one hundred thirty-eight".