678287432999 has 8 divisors (see below), whose sum is σ = 744916035600. Its totient is φ = 612486515200.

The previous prime is 678287432989. The next prime is 678287433071. The reversal of 678287432999 is 999234782876.

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 678287432999 - 2¹⁶ = 678287367463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678287432989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206919482 + ... + 206922759.

It is an arithmetic number, because the mean of its divisors is an integer number (93114504450).

Almost surely, 2^678287432999 is an apocalyptic number.

678287432999 is a deficient number, since it is larger than the sum of its proper divisors (66628602601).

678287432999 is a wasteful number, since it uses less digits than its factorization.

678287432999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413842401.

The product of its digits is 658409472, while the sum is 74.

The spelling of 678287432999 in words is "six hundred seventy-eight billion, two hundred eighty-seven million, four hundred thirty-two thousand, nine hundred ninety-nine".