1680693616 has 80 divisors (see below), whose sum is σ = 3778043904. Its totient is φ = 709454592.

The previous prime is 1680693577. The next prime is 1680693629. The reversal of 1680693616 is 6163960861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2460411 + ... + 2461093.

Almost surely, 2^1680693616 is an apocalyptic number.

1680693616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1680693616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889021952).

1680693616 is an abundant number, since it is smaller than the sum of its proper divisors (2097350288).

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

1680693616 is a wasteful number, since it uses less digits than its factorization.

1680693616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 1680693616 is about 40996.2634394892. The cubic root of 1680693616 is about 1188.9479711919.

The spelling of 1680693616 in words is "one billion, six hundred eighty million, six hundred ninety-three thousand, six hundred sixteen".