1681162912 has 96 divisors (see below), whose sum is σ = 4117345344. Its totient is φ = 663859200.

The previous prime is 1681162871. The next prime is 1681162957. The reversal of 1681162912 is 2192611861.

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, 66987 + ... + 88597.

It is an arithmetic number, because the mean of its divisors is an integer number (42889014).

Almost surely, 2^1681162912 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 1681162912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058672672).

1681162912 is an abundant number, since it is smaller than the sum of its proper divisors (2436182432).

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

1681162912 is a wasteful number, since it uses less digits than its factorization.

1681162912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21662 (or 21654 counting only the distinct ones).

The product of its digits is 10368, while the sum is 37.

The square root of 1681162912 is about 41001.9866835742. The cubic root of 1681162912 is about 1189.0586232458.

The spelling of 1681162912 in words is "one billion, six hundred eighty-one million, one hundred sixty-two thousand, nine hundred twelve".