68778734048 has 48 divisors (see below), whose sum is σ = 139382797680. Its totient is φ = 33384139776.

The previous prime is 68778733999. The next prime is 68778734051. The reversal of 68778734048 is 84043787786.

It is a Cunningham number, because it is equal to 262257²-1.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458948 + ... + 590076.

It is an arithmetic number, because the mean of its divisors is an integer number (2903808285).

Almost surely, 2^68778734048 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 68778734048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69691398840).

68778734048 is an abundant number, since it is smaller than the sum of its proper divisors (70604063632).

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

68778734048 is a wasteful number, since it uses less digits than its factorization.

68778734048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131619 (or 131611 counting only the distinct ones).

The product of its (nonzero) digits is 50577408, while the sum is 62.

The spelling of 68778734048 in words is "sixty-eight billion, seven hundred seventy-eight million, seven hundred thirty-four thousand, forty-eight".