1811055853 has 4 divisors (see below), whose sum is σ = 1811166880. Its totient is φ = 1810944828.

The previous prime is 1811055847. The next prime is 1811055877. The reversal of 1811055853 is 3585501181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3585501181 = 67 ⋅53514943.

It is a cyclic number.

It is not a de Polignac number, because 1811055853 - 2⁵ = 1811055821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811055823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25713 + ... + 65446.

It is an arithmetic number, because the mean of its divisors is an integer number (452791720).

Almost surely, 2^1811055853 is an apocalyptic number.

It is an amenable number.

1811055853 is a deficient number, since it is larger than the sum of its proper divisors (111027).

1811055853 is an equidigital number, since it uses as much as digits as its factorization.

1811055853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111026.

The product of its (nonzero) digits is 24000, while the sum is 37.

The square root of 1811055853 is about 42556.5018886656. The cubic root of 1811055853 is about 1218.9258333797.

The spelling of 1811055853 in words is "one billion, eight hundred eleven million, fifty-five thousand, eight hundred fifty-three".