123168388305 has 16 divisors (see below), whose sum is σ = 197109296064. Its totient is φ = 65676515520.

The previous prime is 123168388297. The next prime is 123168388349. The reversal of 123168388305 is 503883861321.

It is not a de Polignac number, because 123168388305 - 2³ = 123168388297 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 753891 + ... + 902600.

It is an arithmetic number, because the mean of its divisors is an integer number (12319331004).

Almost surely, 2^123168388305 is an apocalyptic number.

123168388305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123168388305 is a deficient number, since it is larger than the sum of its proper divisors (73940907759).

123168388305 is a wasteful number, since it uses less digits than its factorization.

123168388305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661456.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 123168388305 in words is "one hundred twenty-three billion, one hundred sixty-eight million, three hundred eighty-eight thousand, three hundred five".