68136609744 has 240 divisors, whose sum is σ = 222819667200. Its totient is φ = 19428837120.

The previous prime is 68136609721. The next prime is 68136609757. The reversal of 68136609744 is 44790663186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32647069 + ... + 32649155.

It is an arithmetic number, because the mean of its divisors is an integer number (928415280).

Almost surely, 2^68136609744 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 68136609744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111409833600).

68136609744 is an abundant number, since it is smaller than the sum of its proper divisors (154683057456).

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

68136609744 is a wasteful number, since it uses less digits than its factorization.

68136609744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783 (or 2760 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 68136609744 in words is "sixty-eight billion, one hundred thirty-six million, six hundred nine thousand, seven hundred forty-four".