68798692640 has 144 divisors (see below), whose sum is σ = 172954958400. Its totient is φ = 25856520192.

The previous prime is 68798692639. The next prime is 68798692649. The reversal of 68798692640 is 4629689786.

It is not an unprimeable number, because it can be changed into a prime (68798692649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42493751 + ... + 42495369.

It is an arithmetic number, because the mean of its divisors is an integer number (1201076100).

Almost surely, 2^68798692640 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 68798692640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86477479200).

68798692640 is an abundant number, since it is smaller than the sum of its proper divisors (104156265760).

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

68798692640 is a wasteful number, since it uses less digits than its factorization.

68798692640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587 (or 2562 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 68798692640 in words is "sixty-eight billion, seven hundred ninety-eight million, six hundred ninety-two thousand, six hundred forty".