168218228929799 has 4 divisors (see below), whose sum is σ = 178113418866864. Its totient is φ = 158323038992736.

The previous prime is 168218228929789. The next prime is 168218228929813. The reversal of 168218228929799 is 997929822812861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168218228929799 - 2²⁸ = 168217960494343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168218228929739) 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, 4947594968507 + ... + 4947594968540.

It is an arithmetic number, because the mean of its divisors is an integer number (44528354716716).

Almost surely, 2^{168218228929799} is an apocalyptic number.

168218228929799 is a deficient number, since it is larger than the sum of its proper divisors (9895189937065).

168218228929799 is an equidigital number, since it uses as much as digits as its factorization.

168218228929799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9895189937064.

The product of its digits is 2257403904, while the sum is 83.

The spelling of 168218228929799 in words is "one hundred sixty-eight trillion, two hundred eighteen billion, two hundred twenty-eight million, nine hundred twenty-nine thousand, seven hundred ninety-nine".