678931822859 has 2 divisors, whose sum is σ = 678931822860. Its totient is φ = 678931822858.

The previous prime is 678931822801. The next prime is 678931822883. The reversal of 678931822859 is 958228139876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678931822859 - 2²⁰ = 678930774283 is a prime.

It is not a weakly prime, because it can be changed into another prime (678931822559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339465911429 + 339465911430.

It is an arithmetic number, because the mean of its divisors is an integer number (339465911430).

Almost surely, 2^678931822859 is an apocalyptic number.

678931822859 is a deficient number, since it is larger than the sum of its proper divisors (1).

678931822859 is an equidigital number, since it uses as much as digits as its factorization.

678931822859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 68.

The spelling of 678931822859 in words is "six hundred seventy-eight billion, nine hundred thirty-one million, eight hundred twenty-two thousand, eight hundred fifty-nine".