1678145863 has 2 divisors, whose sum is σ = 1678145864. Its totient is φ = 1678145862.

The previous prime is 1678145831. The next prime is 1678145893. The reversal of 1678145863 is 3685418761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1678145863 - 2⁵ = 1678145831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1678145893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839072931 + 839072932.

It is an arithmetic number, because the mean of its divisors is an integer number (839072932).

Almost surely, 2^1678145863 is an apocalyptic number.

1678145863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678145863 is an equidigital number, since it uses as much as digits as its factorization.

1678145863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 1678145863 is about 40965.1786643242. The cubic root of 1678145863 is about 1188.3468944216.

The spelling of 1678145863 in words is "one billion, six hundred seventy-eight million, one hundred forty-five thousand, eight hundred sixty-three".