1681136912 has 80 divisors (see below), whose sum is σ = 4022992512. Its totient is φ = 662722560.

The previous prime is 1681136903. The next prime is 1681136917. The reversal of 1681136912 is 2196311861.

It is not an unprimeable number, because it can be changed into a prime (1681136917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445112 + ... + 448872.

Almost surely, 2^1681136912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1681136912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011496256).

1681136912 is an abundant number, since it is smaller than the sum of its proper divisors (2341855600).

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

1681136912 is a wasteful number, since it uses less digits than its factorization.

1681136912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096 (or 4090 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 1681136912 is about 41001.6696245409. The cubic root of 1681136912 is about 1189.0524934247.

The spelling of 1681136912 in words is "one billion, six hundred eighty-one million, one hundred thirty-six thousand, nine hundred twelve".