123533709818 has 32 divisors (see below), whose sum is σ = 192873882240. Its totient is φ = 59291784000.

The previous prime is 123533709721. The next prime is 123533709841. The reversal of 123533709818 is 818907335321.

123533709818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×123533709818² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2020193 + ... + 2080443.

It is an arithmetic number, because the mean of its divisors is an integer number (6027308820).

Almost surely, 2^123533709818 is an apocalyptic number.

123533709818 is a deficient number, since it is larger than the sum of its proper divisors (69340172422).

123533709818 is a wasteful number, since it uses less digits than its factorization.

123533709818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60662.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 123533709818 in words is "one hundred twenty-three billion, five hundred thirty-three million, seven hundred nine thousand, eight hundred eighteen".