1681680968976 has 20 divisors (see below), whose sum is σ = 4344342503312. Its totient is φ = 560560322976.

The previous prime is 1681680968969. The next prime is 1681680968993. The reversal of 1681680968976 is 6798690861861.

It is a junction number, because it is equal to n+sod(n) for n = 1681680968898 and 1681680968907.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17517510046 + ... + 17517510141.

Almost surely, 2^{1681680968976} is an apocalyptic number.

1681680968976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1681680968976 is an abundant number, since it is smaller than the sum of its proper divisors (2662661534336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681680968976 is a wasteful number, since it uses less digits than its factorization.

1681680968976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35035020198 (or 35035020192 counting only the distinct ones).

The product of its (nonzero) digits is 376233984, while the sum is 75.

The spelling of 1681680968976 in words is "one trillion, six hundred eighty-one billion, six hundred eighty million, nine hundred sixty-eight thousand, nine hundred seventy-six".