168073342331 has 4 divisors (see below), whose sum is σ = 168077998272. Its totient is φ = 168068686392.

The previous prime is 168073342319. The next prime is 168073342337. The reversal of 168073342331 is 133243370861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133243370861 = 3433 ⋅38812517.

It is a cyclic number.

It is not a de Polignac number, because 168073342331 - 2⁶ = 168073342267 is a prime.

It is a super-2 number, since 2×168073342331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168073342337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273396 + ... + 2346161.

It is an arithmetic number, because the mean of its divisors is an integer number (42019499568).

Almost surely, 2^168073342331 is an apocalyptic number.

168073342331 is a deficient number, since it is larger than the sum of its proper divisors (4655941).

168073342331 is an equidigital number, since it uses as much as digits as its factorization.

168073342331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655940.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 168073342331 in words is "one hundred sixty-eight billion, seventy-three million, three hundred forty-two thousand, three hundred thirty-one".