1681149166696 has 8 divisors (see below), whose sum is σ = 3152154687570. Its totient is φ = 840574583344.

The previous prime is 1681149166687. The next prime is 1681149166717. The reversal of 1681149166696 is 6966619411861.

It can be written as a sum of positive squares in only one way, i.e., 1584854388100 + 96294778596 = 1258910^2 + 310314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 105071822911 + ... + 105071822926.

Almost surely, 2^{1681149166696} is an apocalyptic number.

It is an amenable number.

1681149166696 is a deficient number, since it is larger than the sum of its proper divisors (1471005520874).

1681149166696 is a wasteful number, since it uses less digits than its factorization.

1681149166696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210143645843 (or 210143645839 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 64.

The spelling of 1681149166696 in words is "one trillion, six hundred eighty-one billion, one hundred forty-nine million, one hundred sixty-six thousand, six hundred ninety-six".