1680871481 has 8 divisors (see below), whose sum is σ = 1817614080. Its totient is φ = 1548336448.

The previous prime is 1680871477. The next prime is 1680871513. The reversal of 1680871481 is 1841780861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1680871481 - 2² = 1680871477 is a prime.

It is a super-2 number, since 2×1680871481² = 5650657871278266722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1680871421) 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, 1051061 + ... + 1052658.

It is an arithmetic number, because the mean of its divisors is an integer number (227201760).

Almost surely, 2^1680871481 is an apocalyptic number.

It is an amenable number.

1680871481 is a deficient number, since it is larger than the sum of its proper divisors (136742599).

1680871481 is a wasteful number, since it uses less digits than its factorization.

1680871481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103783.

The product of its (nonzero) digits is 86016, while the sum is 44.

The square root of 1680871481 is about 40998.4326651642. The cubic root of 1680871481 is about 1188.9899111722.

The spelling of 1680871481 in words is "one billion, six hundred eighty million, eight hundred seventy-one thousand, four hundred eighty-one".