168040388738 has 16 divisors (see below), whose sum is σ = 256568808960. Its totient is φ = 82520074896.

The previous prime is 168040388723. The next prime is 168040388749. The reversal of 168040388738 is 837883040861.

It is a happy number.

168040388738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526781 + ... + 783312.

It is an arithmetic number, because the mean of its divisors is an integer number (16035550560).

Almost surely, 2^168040388738 is an apocalyptic number.

168040388738 is a deficient number, since it is larger than the sum of its proper divisors (88528420222).

168040388738 is a wasteful number, since it uses less digits than its factorization.

168040388738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311241.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 168040388738 in words is "one hundred sixty-eight billion, forty million, three hundred eighty-eight thousand, seven hundred thirty-eight".