123999822720 has 768 divisors, whose sum is σ = 470833534080. Its totient is φ = 29974855680.

The previous prime is 123999822707. The next prime is 123999822763. The reversal of 123999822720 is 27228999321.

123999822720 is a `hidden beast` number, since 1 + 2 + 399 + 9 + 8 + 227 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 200971852 + ... + 200972468.

Almost surely, 2^123999822720 is an apocalyptic number.

123999822720 is a gapful number since it is divisible by the number (10) 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 123999822720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235416767040).

123999822720 is an abundant number, since it is smaller than the sum of its proper divisors (346833711360).

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

123999822720 is a wasteful number, since it uses less digits than its factorization.

123999822720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 123999822720 in words is "one hundred twenty-three billion, nine hundred ninety-nine million, eight hundred twenty-two thousand, seven hundred twenty".