1855816944 has 40 divisors (see below), whose sum is σ = 5046522240. Its totient is φ = 586047168.

The previous prime is 1855816909. The next prime is 1855816993. The reversal of 1855816944 is 4496185581.

It is a happy number.

1855816944 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016532 + ... + 1018355.

It is an arithmetic number, because the mean of its divisors is an integer number (126163056).

Almost surely, 2^1855816944 is an apocalyptic number.

It is an amenable number.

1855816944 is an abundant number, since it is smaller than the sum of its proper divisors (3190705296).

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

1855816944 is a wasteful number, since it uses less digits than its factorization.

1855816944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034917 (or 2034911 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 51.

The square root of 1855816944 is about 43079.1938643239. The cubic root of 1855816944 is about 1228.8863262140.

The spelling of 1855816944 in words is "one billion, eight hundred fifty-five million, eight hundred sixteen thousand, nine hundred forty-four".