68720555286 has 48 divisors (see below), whose sum is σ = 153954073728. Its totient is φ = 22130928000.

The previous prime is 68720555279. The next prime is 68720555287. The reversal of 68720555286 is 68255502786.

68720555286 is a `hidden beast` number, since 6 + 8 + 7 + 2 + 0 + 5 + 552 + 86 = 666.

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, 232900 + ... + 437816.

It is an arithmetic number, because the mean of its divisors is an integer number (3207376536).

Almost surely, 2^68720555286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68720555286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76977036864).

68720555286 is an abundant number, since it is smaller than the sum of its proper divisors (85233518442).

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

68720555286 is a wasteful number, since it uses less digits than its factorization.

68720555286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205557 (or 205554 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 68720555286 in words is "sixty-eight billion, seven hundred twenty million, five hundred fifty-five thousand, two hundred eighty-six".