123923685312 has 336 divisors, whose sum is σ = 421092172800. Its totient is φ = 34092656640.

The previous prime is 123923685271. The next prime is 123923685329. The reversal of 123923685312 is 213586329321.

123923685312 is a `hidden beast` number, since 1 + 2 + 39 + 23 + 68 + 531 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50394739 + ... + 50397197.

Almost surely, 2^123923685312 is an apocalyptic number.

123923685312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123923685312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210546086400).

123923685312 is an abundant number, since it is smaller than the sum of its proper divisors (297168487488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123923685312 is a wasteful number, since it uses less digits than its factorization.

123923685312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944 (or 2931 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 123923685312 in words is "one hundred twenty-three billion, nine hundred twenty-three million, six hundred eighty-five thousand, three hundred twelve".