123929118720 has 1440 divisors, whose sum is σ = 525716231040. Its totient is φ = 27674542080.

The previous prime is 123929118701. The next prime is 123929118721. The reversal of 123929118720 is 27811929321.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (123929118721) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2636789737 + ... + 2636789783.

It is an arithmetic number, because the mean of its divisors is an integer number (365080716).

Almost surely, 2^123929118720 is an apocalyptic number.

123929118720 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 123929118720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262858115520).

123929118720 is an abundant number, since it is smaller than the sum of its proper divisors (401787112320).

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

123929118720 is a wasteful number, since it uses less digits than its factorization.

123929118720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 123929118720 in words is "one hundred twenty-three billion, nine hundred twenty-nine million, one hundred eighteen thousand, seven hundred twenty".