2000068640689 has 12 divisors (see below), whose sum is σ = 2350596140004. Its totient is φ = 1696670889984.

The previous prime is 2000068640651. The next prime is 2000068640741. The reversal of 2000068640689 is 9860468600002.

It can be written as a sum of positive squares in 2 ways, for example, as 1313808826225 + 686259814464 = 1146215^2 + 828408^2 .

It is not a de Polignac number, because 2000068640689 - 2¹¹ = 2000068638641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (2000068640189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210395904 + ... + 210405409.

It is an arithmetic number, because the mean of its divisors is an integer number (195883011667).

Almost surely, 2^{2000068640689} is an apocalyptic number.

It is an amenable number.

2000068640689 is a deficient number, since it is larger than the sum of its proper divisors (350527499315).

2000068640689 is an equidigital number, since it uses as much as digits as its factorization.

2000068640689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420801424 (or 420801417 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 2000068640689 in words is "two trillion, sixty-eight million, six hundred forty thousand, six hundred eighty-nine".