68820655908788 has 72 divisors (see below), whose sum is σ = 144661439591424. Its totient is φ = 28534658443200.

The previous prime is 68820655908769. The next prime is 68820655908811. The reversal of 68820655908788 is 88780955602886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18815333 + ... + 22173363.

It is an arithmetic number, because the mean of its divisors is an integer number (2009186660992).

Almost surely, 2^{68820655908788} 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 68820655908788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72330719795712).

68820655908788 is an abundant number, since it is smaller than the sum of its proper divisors (75840783682636).

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

68820655908788 is a wasteful number, since it uses less digits than its factorization.

68820655908788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3361453 (or 3361444 counting only the distinct ones).

The product of its (nonzero) digits is 3715891200, while the sum is 80.

The spelling of 68820655908788 in words is "sixty-eight trillion, eight hundred twenty billion, six hundred fifty-five million, nine hundred eight thousand, seven hundred eighty-eight".