1805680494 has 12 divisors (see below), whose sum is σ = 3912307776. Its totient is φ = 601893492.

The previous prime is 1805680493. The next prime is 1805680507. The reversal of 1805680494 is 4940865081.

1805680494 is a `hidden beast` number, since 1 + 80 + 5 + 6 + 80 + 494 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805680493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50157774 + ... + 50157809.

It is an arithmetic number, because the mean of its divisors is an integer number (326025648).

Almost surely, 2^1805680494 is an apocalyptic number.

1805680494 is an abundant number, since it is smaller than the sum of its proper divisors (2106627282).

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

1805680494 is a wasteful number, since it uses less digits than its factorization.

1805680494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100315591 (or 100315588 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1805680494 is about 42493.2994011997. The cubic root of 1805680494 is about 1217.7186817436.

The spelling of 1805680494 in words is "one billion, eight hundred five million, six hundred eighty thousand, four hundred ninety-four".