123663809816800 has 72 divisors (see below), whose sum is σ = 329339209894632. Its totient is φ = 44968658112000.

The previous prime is 123663809816779. The next prime is 123663809816801. The reversal of 123663809816800 is 8618908366321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123663809816801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7026344031 + ... + 7026361630.

It is an arithmetic number, because the mean of its divisors is an integer number (4574155692981).

Almost surely, 2^{123663809816800} is an apocalyptic number.

123663809816800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123663809816800 is an abundant number, since it is smaller than the sum of its proper divisors (205675400077832).

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

123663809816800 is a wasteful number, since it uses less digits than its factorization.

123663809816800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14052705692 (or 14052705679 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 123663809816800 in words is "one hundred twenty-three trillion, six hundred sixty-three billion, eight hundred nine million, eight hundred sixteen thousand, eight hundred".