1855644112 has 120 divisors (see below), whose sum is σ = 4581972360. Its totient is φ = 722534400.

The previous prime is 1855644107. The next prime is 1855644113. The reversal of 1855644112 is 2114465581.

It can be written as a sum of positive squares in 4 ways, for example, as 577152576 + 1278491536 = 24024^2 + 35756^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855644113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384112 + ... + 388912.

It is an arithmetic number, because the mean of its divisors is an integer number (38183103).

Almost surely, 2^1855644112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1855644112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2290986180).

1855644112 is an abundant number, since it is smaller than the sum of its proper divisors (2726328248).

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

1855644112 is a wasteful number, since it uses less digits than its factorization.

1855644112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869 (or 4856 counting only the distinct ones).

The product of its digits is 38400, while the sum is 37.

The square root of 1855644112 is about 43077.1878376479. The cubic root of 1855644112 is about 1228.8481763530.

The spelling of 1855644112 in words is "one billion, eight hundred fifty-five million, six hundred forty-four thousand, one hundred twelve".