678931822863 has 192 divisors, whose sum is σ = 1213863974400. Its totient is φ = 373764948480.

The previous prime is 678931822859. The next prime is 678931822883. The reversal of 678931822863 is 368228139876.

It is not a de Polignac number, because 678931822863 - 2² = 678931822859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 678931822863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678931822883) 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 191 ways as a sum of consecutive naturals, for example, 1659979803 + ... + 1659980211.

It is an arithmetic number, because the mean of its divisors is an integer number (6322208200).

Almost surely, 2^678931822863 is an apocalyptic number.

678931822863 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

678931822863 is a deficient number, since it is larger than the sum of its proper divisors (534932151537).

678931822863 is a wasteful number, since it uses less digits than its factorization.

678931822863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 854 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 63.

The spelling of 678931822863 in words is "six hundred seventy-eight billion, nine hundred thirty-one million, eight hundred twenty-two thousand, eight hundred sixty-three".