168718220979 has 32 divisors (see below), whose sum is σ = 281275047936. Its totient is φ = 87393205920.

The previous prime is 168718220959. The next prime is 168718220999. The reversal of 168718220979 is 979022817861.

It is an interprime number because it is at equal distance from previous prime (168718220959) and next prime (168718220999).

It is not a de Polignac number, because 168718220979 - 2⁹ = 168718220467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168718220959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 972267 + ... + 1132580.

It is an arithmetic number, because the mean of its divisors is an integer number (8789845248).

Almost surely, 2^168718220979 is an apocalyptic number.

168718220979 is a deficient number, since it is larger than the sum of its proper divisors (112556826957).

168718220979 is a wasteful number, since it uses less digits than its factorization.

168718220979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105215.

The product of its (nonzero) digits is 6096384, while the sum is 60.

The spelling of 168718220979 in words is "one hundred sixty-eight billion, seven hundred eighteen million, two hundred twenty thousand, nine hundred seventy-nine".