678858131852567 has 2 divisors, whose sum is σ = 678858131852568. Its totient is φ = 678858131852566.

The previous prime is 678858131852503. The next prime is 678858131852629. The reversal of 678858131852567 is 765258131858876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678858131852567 - 2⁶ = 678858131852503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678858131852491 and 678858131852500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678858131852167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339429065926283 + 339429065926284.

It is an arithmetic number, because the mean of its divisors is an integer number (339429065926284).

Almost surely, 2^{678858131852567} is an apocalyptic number.

678858131852567 is a deficient number, since it is larger than the sum of its proper divisors (1).

678858131852567 is an equidigital number, since it uses as much as digits as its factorization.

678858131852567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008000, while the sum is 80.

The spelling of 678858131852567 in words is "six hundred seventy-eight trillion, eight hundred fifty-eight billion, one hundred thirty-one million, eight hundred fifty-two thousand, five hundred sixty-seven".