1816845912 has 144 divisors (see below), whose sum is σ = 5846312160. Its totient is φ = 508007808.

The previous prime is 1816845881. The next prime is 1816845931. The reversal of 1816845912 is 2195486181.

It is a happy number.

1816845912 is a `hidden beast` number, since 181 + 6 + 8 + 459 + 12 = 666.

It is a super-2 number, since 2×1816845912² = 6601858135902223488, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 160338 + ... + 171294.

It is an arithmetic number, because the mean of its divisors is an integer number (40599390).

Almost surely, 2^1816845912 is an apocalyptic number.

1816845912 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 1816845912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2923156080).

1816845912 is an abundant number, since it is smaller than the sum of its proper divisors (4029466248).

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

1816845912 is a wasteful number, since it uses less digits than its factorization.

1816845912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030 (or 11016 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 1816845912 is about 42624.4755041044. The cubic root of 1816845912 is about 1220.2234455909.

The spelling of 1816845912 in words is "one billion, eight hundred sixteen million, eight hundred forty-five thousand, nine hundred twelve".