1806606144 has 84 divisors (see below), whose sum is σ = 5918082144. Its totient is φ = 516172032.

The previous prime is 1806606101. The next prime is 1806606181. The reversal of 1806606144 is 4416066081.

1806606144 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 606 + 1 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

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

It is a junction number, because it is equal to n+sod(n) for n = 1806606099 and 1806606108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220002 + ... + 228065.

Almost surely, 2^1806606144 is an apocalyptic number.

1806606144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1806606144 is an abundant number, since it is smaller than the sum of its proper divisors (4111476000).

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

1806606144 is a wasteful number, since it uses less digits than its factorization.

1806606144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448092 (or 448079 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 1806606144 is about 42504.1897228967. The cubic root of 1806606144 is about 1217.9267268077.

The spelling of 1806606144 in words is "one billion, eight hundred six million, six hundred six thousand, one hundred forty-four".