168138428307 has 16 divisors (see below), whose sum is σ = 225167645472. Its totient is φ = 111600967680.

The previous prime is 168138428299. The next prime is 168138428369. The reversal of 168138428307 is 703824831861.

It is not a de Polignac number, because 168138428307 - 2³ = 168138428299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168138428307.

It is not an unprimeable number, because it can be changed into a prime (168138428377) 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, 3342043 + ... + 3391979.

It is an arithmetic number, because the mean of its divisors is an integer number (14072977842).

Almost surely, 2^168138428307 is an apocalyptic number.

168138428307 is a deficient number, since it is larger than the sum of its proper divisors (57029217165).

168138428307 is a wasteful number, since it uses less digits than its factorization.

168138428307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54838.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 168138428307 in words is "one hundred sixty-eight billion, one hundred thirty-eight million, four hundred twenty-eight thousand, three hundred seven".