1681065328 has 40 divisors (see below), whose sum is σ = 3315542256. Its totient is φ = 825484800.

The previous prime is 1681065307. The next prime is 1681065329. The reversal of 1681065328 is 8235601861.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681065329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1134348 + ... + 1135828.

Almost surely, 2^1681065328 is an apocalyptic number.

It is an amenable number.

1681065328 is a deficient number, since it is larger than the sum of its proper divisors (1634476928).

1681065328 is a wasteful number, since it uses less digits than its factorization.

1681065328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2707 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1681065328 is about 41000.7966751867. The cubic root of 1681065328 is about 1189.0356162862.

The spelling of 1681065328 in words is "one billion, six hundred eighty-one million, sixty-five thousand, three hundred twenty-eight".