1681755568 has 20 divisors (see below), whose sum is σ = 3259714480. Its totient is φ = 840538944.

The previous prime is 1681755557. The next prime is 1681755571. The reversal of 1681755568 is 8655571861.

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, 22498 + ... + 62206.

It is an arithmetic number, because the mean of its divisors is an integer number (162985724).

Almost surely, 2^1681755568 is an apocalyptic number.

It is an amenable number.

1681755568 is a deficient number, since it is larger than the sum of its proper divisors (1577958912).

1681755568 is a wasteful number, since it uses less digits than its factorization.

1681755568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42364 (or 42358 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 52.

The square root of 1681755568 is about 41009.2132087413. The cubic root of 1681755568 is about 1189.1983320806.

The spelling of 1681755568 in words is "one billion, six hundred eighty-one million, seven hundred fifty-five thousand, five hundred sixty-eight".