68388504240 has 720 divisors, whose sum is σ = 264658998240. Its totient is φ = 14561648640.

The previous prime is 68388504209. The next prime is 68388504253. The reversal of 68388504240 is 4240588386.

68388504240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 68388504240.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 377836950 + ... + 377837130.

It is an arithmetic number, because the mean of its divisors is an integer number (367581942).

Almost surely, 2^68388504240 is an apocalyptic number.

68388504240 is a gapful number since it is divisible by the number (60) 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 68388504240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132329499120).

68388504240 is an abundant number, since it is smaller than the sum of its proper divisors (196270494000).

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

68388504240 is a wasteful number, since it uses less digits than its factorization.

68388504240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 68388504240 in words is "sixty-eight billion, three hundred eighty-eight million, five hundred four thousand, two hundred forty".