168108249019 has 4 divisors (see below), whose sum is σ = 168238667880. Its totient is φ = 167977830160.

The previous prime is 168108248999. The next prime is 168108249037. The reversal of 168108249019 is 910942801861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910942801861 = 9859 ⋅92397079.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168108249019 is a prime.

It is a super-2 number, since 2×168108249019² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168108249319) 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, 65207497 + ... + 65210074.

It is an arithmetic number, because the mean of its divisors is an integer number (42059666970).

Almost surely, 2^168108249019 is an apocalyptic number.

168108249019 is a deficient number, since it is larger than the sum of its proper divisors (130418861).

168108249019 is a wasteful number, since it uses less digits than its factorization.

168108249019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130418860.

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 168108249019 in words is "one hundred sixty-eight billion, one hundred eight million, two hundred forty-nine thousand, nineteen".