1680581512 has 32 divisors (see below), whose sum is σ = 3355781400. Its totient is φ = 786279424.

The previous prime is 1680581501. The next prime is 1680581531. The reversal of 1680581512 is 2151850861.

It can be written as a sum of positive squares in 4 ways, for example, as 1508079556 + 172501956 = 38834^2 + 13134^2 .

It is a super-2 number, since 2×1680581512² = 5648708436952412288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12187 + ... + 59242.

Almost surely, 2^1680581512 is an apocalyptic number.

It is an amenable number.

1680581512 is a deficient number, since it is larger than the sum of its proper divisors (1675199888).

1680581512 is a wasteful number, since it uses less digits than its factorization.

1680581512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71625 (or 71621 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 1680581512 is about 40994.8961701332. The cubic root of 1680581512 is about 1188.9215359183.

The spelling of 1680581512 in words is "one billion, six hundred eighty million, five hundred eighty-one thousand, five hundred twelve".