678537345199 has 8 divisors (see below), whose sum is σ = 775477021088. Its totient is φ = 581599111680.

The previous prime is 678537345163. The next prime is 678537345203. The reversal of 678537345199 is 991543735876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678537345199 - 2²¹ = 678535248047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678537345149) 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, 979519 + ... + 1522015.

It is an arithmetic number, because the mean of its divisors is an integer number (96934627636).

Almost surely, 2^678537345199 is an apocalyptic number.

678537345199 is a deficient number, since it is larger than the sum of its proper divisors (96939675889).

678537345199 is a wasteful number, since it uses less digits than its factorization.

678537345199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721185.

The product of its digits is 171460800, while the sum is 67.

The spelling of 678537345199 in words is "six hundred seventy-eight billion, five hundred thirty-seven million, three hundred forty-five thousand, one hundred ninety-nine".