1803806781118 has 4 divisors (see below), whose sum is σ = 2705710171680. Its totient is φ = 901903390558.

The previous prime is 1803806781113. The next prime is 1803806781137. The reversal of 1803806781118 is 8111876083081.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1803806781118² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803806781113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450951695278 + ... + 450951695281.

It is an arithmetic number, because the mean of its divisors is an integer number (676427542920).

Almost surely, 2^{1803806781118} is an apocalyptic number.

1803806781118 is a deficient number, since it is larger than the sum of its proper divisors (901903390562).

1803806781118 is an equidigital number, since it uses as much as digits as its factorization.

1803806781118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901903390561.

The product of its (nonzero) digits is 516096, while the sum is 52.

The spelling of 1803806781118 in words is "one trillion, eight hundred three billion, eight hundred six million, seven hundred eighty-one thousand, one hundred eighteen".