1812655044 has 48 divisors (see below), whose sum is σ = 4716893440. Its totient is φ = 601979040.

The previous prime is 1812655021. The next prime is 1812655069. The reversal of 1812655044 is 4405562181.

It is a happy number.

1812655044 is a `hidden beast` number, since 1 + 81 + 26 + 550 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1699 + ... + 60234.

Almost surely, 2^1812655044 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 1812655044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2358446720).

1812655044 is an abundant number, since it is smaller than the sum of its proper divisors (2904238396).

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

1812655044 is a wasteful number, since it uses less digits than its factorization.

1812655044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62217 (or 62209 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 1812655044 is about 42575.2867753113. The cubic root of 1812655044 is about 1219.2845047680.

The spelling of 1812655044 in words is "one billion, eight hundred twelve million, six hundred fifty-five thousand, forty-four".