1681851532 has 6 divisors (see below), whose sum is σ = 2943240188. Its totient is φ = 840925764.

The previous prime is 1681851527. The next prime is 1681851533. The reversal of 1681851532 is 2351581861.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1681851533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210231438 + ... + 210231445.

Almost surely, 2^1681851532 is an apocalyptic number.

It is an amenable number.

1681851532 is a deficient number, since it is larger than the sum of its proper divisors (1261388656).

1681851532 is a wasteful number, since it uses less digits than its factorization.

1681851532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420462887 (or 420462885 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 1681851532 is about 41010.3832218135. The cubic root of 1681851532 is about 1189.2209509162.

The spelling of 1681851532 in words is "one billion, six hundred eighty-one million, eight hundred fifty-one thousand, five hundred thirty-two".