123240685568 has 672 divisors, whose sum is σ = 357694626240. Its totient is φ = 41617981440.

The previous prime is 123240685567. The next prime is 123240685591. The reversal of 123240685568 is 865586042321.

123240685568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (123240685567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1090625480 + ... + 1090625592.

It is an arithmetic number, because the mean of its divisors is an integer number (532283670).

Almost surely, 2^123240685568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123240685568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178847313120).

123240685568 is an abundant number, since it is smaller than the sum of its proper divisors (234453940672).

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

123240685568 is a wasteful number, since it uses less digits than its factorization.

123240685568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 50.

It can be divided in two parts, 123240 and 685568, that added together give a palindrome (808808).

The spelling of 123240685568 in words is "one hundred twenty-three billion, two hundred forty million, six hundred eighty-five thousand, five hundred sixty-eight".