1800649830609 has 16 divisors (see below), whose sum is σ = 3048719290240. Its totient is φ = 1028942760240.

The previous prime is 1800649830599. The next prime is 1800649830631. The reversal of 1800649830609 is 9060389460081.

It is not a de Polignac number, because 1800649830609 - 2³⁹ = 1250894016721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1800649830209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4763623702 + ... + 4763624079.

It is an arithmetic number, because the mean of its divisors is an integer number (190544955640).

Almost surely, 2^{1800649830609} is an apocalyptic number.

It is an amenable number.

1800649830609 is a deficient number, since it is larger than the sum of its proper divisors (1248069459631).

1800649830609 is an equidigital number, since it uses as much as digits as its factorization.

1800649830609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9527247797 (or 9527247791 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 1800649830609 in words is "one trillion, eight hundred billion, six hundred forty-nine million, eight hundred thirty thousand, six hundred nine".