68720555288 has 96 divisors (see below), whose sum is σ = 163623402000. Its totient is φ = 26756352000.

The previous prime is 68720555287. The next prime is 68720555297. The reversal of 68720555288 is 88255502786.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68720555287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7761488 + ... + 7770336.

Almost surely, 2^68720555288 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 68720555288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81811701000).

68720555288 is an abundant number, since it is smaller than the sum of its proper divisors (94902846712).

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

68720555288 is a wasteful number, since it uses less digits than its factorization.

68720555288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10681 (or 10670 counting only the distinct ones).

The product of its (nonzero) digits is 10752000, while the sum is 56.

The spelling of 68720555288 in words is "sixty-eight billion, seven hundred twenty million, five hundred fifty-five thousand, two hundred eighty-eight".