1680978444216 has 32 divisors (see below), whose sum is σ = 4202519706000. Its totient is φ = 560316335360.

The previous prime is 1680978444169. The next prime is 1680978444221. The reversal of 1680978444216 is 6124448790861.

It is a self number, because there is not a number n which added to its sum of digits gives 1680978444216.

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, 857710 + ... + 2024258.

Almost surely, 2^{1680978444216} is an apocalyptic number.

It is an amenable number.

1680978444216 is an abundant number, since it is smaller than the sum of its proper divisors (2521541261784).

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

1680978444216 is a wasteful number, since it uses less digits than its factorization.

1680978444216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226599 (or 1226595 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 1680978444216 in words is "one trillion, six hundred eighty billion, nine hundred seventy-eight million, four hundred forty-four thousand, two hundred sixteen".