168684134538 has 32 divisors (see below), whose sum is σ = 352709715456. Its totient is φ = 53680488048.

The previous prime is 168684134477. The next prime is 168684134539. The reversal of 168684134538 is 835431486861.

It is not an unprimeable number, because it can be changed into a prime (168684134539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1096420 + ... + 1240767.

It is an arithmetic number, because the mean of its divisors is an integer number (11022178608).

Almost surely, 2^168684134538 is an apocalyptic number.

168684134538 is an abundant number, since it is smaller than the sum of its proper divisors (184025580918).

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

168684134538 is a wasteful number, since it uses less digits than its factorization.

168684134538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337738.

The product of its digits is 13271040, while the sum is 57.

The spelling of 168684134538 in words is "one hundred sixty-eight billion, six hundred eighty-four million, one hundred thirty-four thousand, five hundred thirty-eight".