1681712016 has 20 divisors (see below), whose sum is σ = 4344422832. Its totient is φ = 560570656.

The previous prime is 1681712009. The next prime is 1681712027. The reversal of 1681712016 is 6102171861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17517786 + ... + 17517881.

Almost surely, 2^1681712016 is an apocalyptic number.

1681712016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1681712016 is an abundant number, since it is smaller than the sum of its proper divisors (2662710816).

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

1681712016 is a wasteful number, since it uses less digits than its factorization.

1681712016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35035678 (or 35035672 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 1681712016 is about 41008.6822026751. The cubic root of 1681712016 is about 1189.1880665355.

Adding to 1681712016 its reverse (6102171861), we get a palindrome (7783883877).

The spelling of 1681712016 in words is "one billion, six hundred eighty-one million, seven hundred twelve thousand, sixteen".