678200398209 has 8 divisors (see below), whose sum is σ = 1004741330720. Its totient is φ = 452133598788.

The previous prime is 678200398189. The next prime is 678200398217. The reversal of 678200398209 is 902893002876.

It is a happy number.

It is not a de Polignac number, because 678200398209 - 2²⁹ = 677663527297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678200398279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12559266607 + ... + 12559266660.

It is an arithmetic number, because the mean of its divisors is an integer number (125592666340).

Almost surely, 2^678200398209 is an apocalyptic number.

It is an amenable number.

678200398209 is a deficient number, since it is larger than the sum of its proper divisors (326540932511).

678200398209 is a wasteful number, since it uses less digits than its factorization.

678200398209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25118533276 (or 25118533270 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 678200398209 in words is "six hundred seventy-eight billion, two hundred million, three hundred ninety-eight thousand, two hundred nine".