68287812840 has 96 divisors (see below), whose sum is σ = 239007361320. Its totient is φ = 16809306624.

The previous prime is 68287812823. The next prime is 68287812841. The reversal of 68287812840 is 4821878286.

68287812840 is a `hidden beast` number, since 6 + 8 + 287 + 81 + 284 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 50492786436 + 17795026404 = 224706^2 + 133398^2 .

It is not an unprimeable number, because it can be changed into a prime (68287812841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7291027 + ... + 7300386.

Almost surely, 2^68287812840 is an apocalyptic number.

68287812840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68287812840 is an abundant number, since it is smaller than the sum of its proper divisors (170719548480).

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

68287812840 is a wasteful number, since it uses less digits than its factorization.

68287812840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14591443 (or 14591436 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 54.

The spelling of 68287812840 in words is "sixty-eight billion, two hundred eighty-seven million, eight hundred twelve thousand, eight hundred forty".