68913326240640 has 2560 divisors, whose sum is σ = 313219343923200. Its totient is φ = 14075880800256.

The previous prime is 68913326240639. The next prime is 68913326240651. The reversal of 68913326240640 is 4604262331986.

68913326240640 is a `hidden beast` number, since 6 + 8 + 9 + 1 + 3 + 3 + 2 + 624 + 0 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 11576231904 + ... + 11576237856.

It is an arithmetic number, because the mean of its divisors is an integer number (122351306220).

Almost surely, 2^{68913326240640} is an apocalyptic number.

68913326240640 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 68913326240640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156609671961600).

68913326240640 is an abundant number, since it is smaller than the sum of its proper divisors (244306017682560).

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

68913326240640 is a wasteful number, since it uses less digits than its factorization.

68913326240640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106 (or 6085 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 68913326240640 in words is "sixty-eight trillion, nine hundred thirteen billion, three hundred twenty-six million, two hundred forty thousand, six hundred forty".