11808003781 has 16 divisors (see below), whose sum is σ = 14063270400. Its totient is φ = 9905789040.

The previous prime is 11808003707. The next prime is 11808003793. The reversal of 11808003781 is 18730080811.

It is not a de Polignac number, because 11808003781 - 2⁹ = 11808003269 is a prime.

It is a super-2 number, since 2×11808003781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11808003781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11808006781) 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, 350110 + ... + 382351.

It is an arithmetic number, because the mean of its divisors is an integer number (878954400).

Almost surely, 2^11808003781 is an apocalyptic number.

It is an amenable number.

11808003781 is a deficient number, since it is larger than the sum of its proper divisors (2255266619).

11808003781 is an frugal number, since it uses more digits than its factorization.

11808003781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732529 (or 732515 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 37.

The spelling of 11808003781 in words is "eleven billion, eight hundred eight million, three thousand, seven hundred eighty-one".