1806801680 has 20 divisors (see below), whose sum is σ = 4200814092. Its totient is φ = 722720640.

The previous prime is 1806801671. The next prime is 1806801707. The reversal of 1806801680 is 861086081.

1806801680 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 318693904 + 1488107776 = 17852^2 + 38576^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 11292431 + ... + 11292590.

Almost surely, 2^1806801680 is an apocalyptic number.

1806801680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1806801680 is an abundant number, since it is smaller than the sum of its proper divisors (2394012412).

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

1806801680 is a wasteful number, since it uses less digits than its factorization.

1806801680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22585034 (or 22585028 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 1806801680 is about 42506.4898574324. The cubic root of 1806801680 is about 1217.9706655360.

The spelling of 1806801680 in words is "one billion, eight hundred six million, eight hundred one thousand, six hundred eighty".