1678256467 has 2 divisors, whose sum is σ = 1678256468. Its totient is φ = 1678256466.

The previous prime is 1678256423. The next prime is 1678256509. The reversal of 1678256467 is 7646528761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1678256467 - 2¹⁵ = 1678223699 is a prime.

It is not a weakly prime, because it can be changed into another prime (1678256407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839128233 + 839128234.

It is an arithmetic number, because the mean of its divisors is an integer number (839128234).

Almost surely, 2^1678256467 is an apocalyptic number.

1678256467 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678256467 is an equidigital number, since it uses as much as digits as its factorization.

1678256467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 52.

The square root of 1678256467 is about 40966.5286178851. The cubic root of 1678256467 is about 1188.3730012171.

The spelling of 1678256467 in words is "one billion, six hundred seventy-eight million, two hundred fifty-six thousand, four hundred sixty-seven".