1681816382446 has 16 divisors (see below), whose sum is σ = 2682584184384. Its totient is φ = 788046248704.

The previous prime is 1681816382359. The next prime is 1681816382461. The reversal of 1681816382446 is 6442836181861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106140550 + ... + 106156393.

It is an arithmetic number, because the mean of its divisors is an integer number (167661511524).

Almost surely, 2^{1681816382446} is an apocalyptic number.

1681816382446 is a deficient number, since it is larger than the sum of its proper divisors (1000767801938).

1681816382446 is a wasteful number, since it uses less digits than its factorization.

1681816382446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212297195.

The product of its digits is 10616832, while the sum is 58.

The spelling of 1681816382446 in words is "one trillion, six hundred eighty-one billion, eight hundred sixteen million, three hundred eighty-two thousand, four hundred forty-six".