68447888816 has 40 divisors (see below), whose sum is σ = 139687726080. Its totient is φ = 32401767744.

The previous prime is 68447888771. The next prime is 68447888857. The reversal of 68447888816 is 61888874486.

It is a super-2 number, since 2×68447888816² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404525 + ... + 548211.

It is an arithmetic number, because the mean of its divisors is an integer number (3492193152).

Almost surely, 2^68447888816 is an apocalyptic number.

It is an amenable number.

68447888816 is an abundant number, since it is smaller than the sum of its proper divisors (71239837264).

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

68447888816 is a wasteful number, since it uses less digits than its factorization.

68447888816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145281 (or 145275 counting only the distinct ones).

The product of its digits is 132120576, while the sum is 68.

The spelling of 68447888816 in words is "sixty-eight billion, four hundred forty-seven million, eight hundred eighty-eight thousand, eight hundred sixteen".