1811115852 has 144 divisors (see below), whose sum is σ = 5465521152. Its totient is φ = 462188160.

The previous prime is 1811115829. The next prime is 1811115871. The reversal of 1811115852 is 2585111181.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233143 + ... + 240785.

It is an arithmetic number, because the mean of its divisors is an integer number (37955008).

Almost surely, 2^1811115852 is an apocalyptic number.

1811115852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1811115852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2732760576).

1811115852 is an abundant number, since it is smaller than the sum of its proper divisors (3654405300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1811115852 is a wasteful number, since it uses less digits than its factorization.

1811115852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708 (or 7699 counting only the distinct ones).

The product of its digits is 3200, while the sum is 33.

The square root of 1811115852 is about 42557.2068162374. The cubic root of 1811115852 is about 1218.9392939481.

The spelling of 1811115852 in words is "one billion, eight hundred eleven million, one hundred fifteen thousand, eight hundred fifty-two".