1806136555185 has 48 divisors (see below), whose sum is σ = 3161356445520. Its totient is φ = 953855692800.

The previous prime is 1806136555063. The next prime is 1806136555189. The reversal of 1806136555185 is 5815556316081.

1806136555185 is a `hidden beast` number, since 1 + 8 + 0 + 6 + 1 + 3 + 6 + 5 + 551 + 85 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 92296870416 + 1713839684769 = 303804^2 + 1309137^2 .

It is not a de Polignac number, because 1806136555185 - 2¹⁵ = 1806136522417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1806136555189) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 2106871 + ... + 2837459.

It is an arithmetic number, because the mean of its divisors is an integer number (65861592615).

Almost surely, 2^{1806136555185} is an apocalyptic number.

1806136555185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1806136555185 is a deficient number, since it is larger than the sum of its proper divisors (1355219890335).

1806136555185 is a wasteful number, since it uses less digits than its factorization.

1806136555185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731138 (or 731135 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 54.

The spelling of 1806136555185 in words is "one trillion, eight hundred six billion, one hundred thirty-six million, five hundred fifty-five thousand, one hundred eighty-five".