68305778508 has 96 divisors (see below), whose sum is σ = 177813603072. Its totient is φ = 20234188800.

The previous prime is 68305778503. The next prime is 68305778579. The reversal of 68305778508 is 80587750386.

It is not an unprimeable number, because it can be changed into a prime (68305778503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1057503 + ... + 1120233.

It is an arithmetic number, because the mean of its divisors is an integer number (1852225032).

Almost surely, 2^68305778508 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 68305778508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88906801536).

68305778508 is an abundant number, since it is smaller than the sum of its proper divisors (109507824564).

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

68305778508 is a wasteful number, since it uses less digits than its factorization.

68305778508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62935 (or 62933 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 57.

The spelling of 68305778508 in words is "sixty-eight billion, three hundred five million, seven hundred seventy-eight thousand, five hundred eight".