1678205013 has 16 divisors (see below), whose sum is σ = 2271214080. Its totient is φ = 1102117616.

The previous prime is 1678204993. The next prime is 1678205017. The reversal of 1678205013 is 3105028761.

It is a cyclic number.

It is not a de Polignac number, because 1678205013 - 2⁵ = 1678204981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678205017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42856 + ... + 72062.

It is an arithmetic number, because the mean of its divisors is an integer number (141950880).

Almost surely, 2^1678205013 is an apocalyptic number.

It is an amenable number.

1678205013 is a deficient number, since it is larger than the sum of its proper divisors (593009067).

1678205013 is a wasteful number, since it uses less digits than its factorization.

1678205013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29496.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1678205013 is about 40965.9006125827. The cubic root of 1678205013 is about 1188.3608562379.

The spelling of 1678205013 in words is "one billion, six hundred seventy-eight million, two hundred five thousand, thirteen".