1681534612 has 12 divisors (see below), whose sum is σ = 3037611136. Its totient is φ = 813645720.

The previous prime is 1681534609. The next prime is 1681534649. The reversal of 1681534612 is 2164351861.

It is a happy number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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, 6780258 + ... + 6780505.

Almost surely, 2^1681534612 is an apocalyptic number.

It is an amenable number.

1681534612 is a deficient number, since it is larger than the sum of its proper divisors (1356076524).

1681534612 is a wasteful number, since it uses less digits than its factorization.

1681534612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13560798 (or 13560796 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1681534612 is about 41006.5191402538. The cubic root of 1681534612 is about 1189.1462492017.

The spelling of 1681534612 in words is "one billion, six hundred eighty-one million, five hundred thirty-four thousand, six hundred twelve".