68486508816 has 40 divisors (see below), whose sum is σ = 193007435424. Its totient is φ = 20753487360.

The previous prime is 68486508791. The next prime is 68486508817. The reversal of 68486508816 is 61880568486.

It is a self number, because there is not a number n which added to its sum of digits gives 68486508816.

It is not an unprimeable number, because it can be changed into a prime (68486508817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64854121 + ... + 64855176.

Almost surely, 2^68486508816 is an apocalyptic number.

68486508816 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

68486508816 is an abundant number, since it is smaller than the sum of its proper divisors (124520926608).

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

68486508816 is a wasteful number, since it uses less digits than its factorization.

68486508816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129709319 (or 129709313 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 60.

The spelling of 68486508816 in words is "sixty-eight billion, four hundred eighty-six million, five hundred eight thousand, eight hundred sixteen".