1680536412 has 72 divisors (see below), whose sum is σ = 4459553280. Its totient is φ = 532899360.

The previous prime is 1680536383. The next prime is 1680536461. The reversal of 1680536412 is 2146350861.

It is a happy number.

1680536412 is a `hidden beast` number, since 1 + 6 + 8 + 0 + 5 + 3 + 641 + 2 = 666.

1680536412 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53083 + ... + 78605.

It is an arithmetic number, because the mean of its divisors is an integer number (61938240).

Almost surely, 2^1680536412 is an apocalyptic number.

1680536412 is a gapful number since it is divisible by the number (12) 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 1680536412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229776640).

1680536412 is an abundant number, since it is smaller than the sum of its proper divisors (2779016868).

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

1680536412 is a wasteful number, since it uses less digits than its factorization.

1680536412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25623 (or 25618 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1680536412 is about 40994.3460979682. The cubic root of 1680536412 is about 1188.9109005439.

The spelling of 1680536412 in words is "one billion, six hundred eighty million, five hundred thirty-six thousand, four hundred twelve".