1678944463 has 8 divisors (see below), whose sum is σ = 2031664032. Its totient is φ = 1354442496.

The previous prime is 1678944391. The next prime is 1678944467. The reversal of 1678944463 is 3644498761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1678944463 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 1678944463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678944467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7054270 + ... + 7054507.

It is an arithmetic number, because the mean of its divisors is an integer number (253958004).

Almost surely, 2^1678944463 is an apocalyptic number.

1678944463 is a deficient number, since it is larger than the sum of its proper divisors (352719569).

1678944463 is a wasteful number, since it uses less digits than its factorization.

1678944463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14108801.

The product of its digits is 3483648, while the sum is 52.

The square root of 1678944463 is about 40974.9248077406. The cubic root of 1678944463 is about 1188.5353689658.

The spelling of 1678944463 in words is "one billion, six hundred seventy-eight million, nine hundred forty-four thousand, four hundred sixty-three".