1681864160 has 48 divisors (see below), whose sum is σ = 4065825456. Its totient is φ = 657097728.

The previous prime is 1681864159. The next prime is 1681864183. The reversal of 1681864160 is 614681861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115349 + ... + 129108.

It is an arithmetic number, because the mean of its divisors is an integer number (84704697).

Almost surely, 2^1681864160 is an apocalyptic number.

1681864160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681864160 is an abundant number, since it is smaller than the sum of its proper divisors (2383961296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1681864160 is a wasteful number, since it uses less digits than its factorization.

1681864160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244515 (or 244507 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1681864160 is about 41010.5371825340. The cubic root of 1681864160 is about 1189.2239272877.

The spelling of 1681864160 in words is "one billion, six hundred eighty-one million, eight hundred sixty-four thousand, one hundred sixty".