1678481863 has 4 divisors (see below), whose sum is σ = 1681247680. Its totient is φ = 1675716048.

The previous prime is 1678481839. The next prime is 1678481873. The reversal of 1678481863 is 3681848761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3681848761 = 109 ⋅33778429.

It is a cyclic number.

It is not a de Polignac number, because 1678481863 - 2⁹ = 1678481351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1678481863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678481803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381998 + ... + 1383211.

It is an arithmetic number, because the mean of its divisors is an integer number (420311920).

Almost surely, 2^1678481863 is an apocalyptic number.

1678481863 is a deficient number, since it is larger than the sum of its proper divisors (2765817).

1678481863 is an equidigital number, since it uses as much as digits as its factorization.

1678481863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765816.

The product of its digits is 1548288, while the sum is 52.

The square root of 1678481863 is about 40969.2795030618. The cubic root of 1678481863 is about 1188.4261997867.

The spelling of 1678481863 in words is "one billion, six hundred seventy-eight million, four hundred eighty-one thousand, eight hundred sixty-three".