1680081336 has 48 divisors (see below), whose sum is σ = 4564818960. Its totient is φ = 558230400.

The previous prime is 1680081283. The next prime is 1680081341. The reversal of 1680081336 is 6331800861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1680081336.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14740 + ... + 59811.

It is an arithmetic number, because the mean of its divisors is an integer number (95100395).

Almost surely, 2^1680081336 is an apocalyptic number.

It is an amenable number.

1680081336 is an abundant number, since it is smaller than the sum of its proper divisors (2884737624).

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

1680081336 is a wasteful number, since it uses less digits than its factorization.

1680081336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74876 (or 74869 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1680081336 is about 40988.7952494337. The cubic root of 1680081336 is about 1188.8035749587.

The spelling of 1680081336 in words is "one billion, six hundred eighty million, eighty-one thousand, three hundred thirty-six".