1803775055949 has 6 divisors (see below), whose sum is σ = 2605452858606. Its totient is φ = 1202516703960.

The previous prime is 1803775055933. The next prime is 1803775055977. The reversal of 1803775055949 is 9495505773081.

1803775055949 is a `hidden beast` number, since 1 + 8 + 0 + 3 + 7 + 75 + 0 + 559 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1482932111049 + 320842944900 = 1217757^2 + 566430^2 .

It is not a de Polignac number, because 1803775055949 - 2⁴ = 1803775055933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803775055149) 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 5 ways as a sum of consecutive naturals, for example, 100209725322 + ... + 100209725339.

It is an arithmetic number, because the mean of its divisors is an integer number (434242143101).

Almost surely, 2^{1803775055949} is an apocalyptic number.

It is an amenable number.

1803775055949 is a deficient number, since it is larger than the sum of its proper divisors (801677802657).

1803775055949 is a wasteful number, since it uses less digits than its factorization.

1803775055949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200419450667 (or 200419450664 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 63.

The spelling of 1803775055949 in words is "one trillion, eight hundred three billion, seven hundred seventy-five million, fifty-five thousand, nine hundred forty-nine".