678350889191 has 2 divisors, whose sum is σ = 678350889192. Its totient is φ = 678350889190.

The previous prime is 678350889169. The next prime is 678350889283. The reversal of 678350889191 is 191988053876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 678350889191 - 2²² = 678346694887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678350880191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339175444595 + 339175444596.

It is an arithmetic number, because the mean of its divisors is an integer number (339175444596).

Almost surely, 2^678350889191 is an apocalyptic number.

678350889191 is a deficient number, since it is larger than the sum of its proper divisors (1).

678350889191 is an equidigital number, since it uses as much as digits as its factorization.

678350889191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 65.

The spelling of 678350889191 in words is "six hundred seventy-eight billion, three hundred fifty million, eight hundred eighty-nine thousand, one hundred ninety-one".