1683641218678 has 32 divisors (see below), whose sum is σ = 2630718731520. Its totient is φ = 807468812640.

The previous prime is 1683641218621. The next prime is 1683641218687. The reversal of 1683641218678 is 8768121463861.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4734988 + ... + 5078128.

It is an arithmetic number, because the mean of its divisors is an integer number (82209960360).

Almost surely, 2^{1683641218678} is an apocalyptic number.

1683641218678 is a deficient number, since it is larger than the sum of its proper divisors (947077512842).

1683641218678 is a wasteful number, since it uses less digits than its factorization.

1683641218678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344212.

The product of its digits is 18579456, while the sum is 61.

The spelling of 1683641218678 in words is "one trillion, six hundred eighty-three billion, six hundred forty-one million, two hundred eighteen thousand, six hundred seventy-eight".