1805650149 has 32 divisors (see below), whose sum is σ = 2532556800. Its totient is φ = 1142930880.

The previous prime is 1805650141. The next prime is 1805650153. The reversal of 1805650149 is 9410565081.

It is not a de Polignac number, because 1805650149 - 2³ = 1805650141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805650141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1314427 + ... + 1315799.

It is an arithmetic number, because the mean of its divisors is an integer number (79142400).

Almost surely, 2^1805650149 is an apocalyptic number.

It is an amenable number.

1805650149 is a deficient number, since it is larger than the sum of its proper divisors (726906651).

1805650149 is a wasteful number, since it uses less digits than its factorization.

1805650149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 1805650149 is about 42492.9423434057. The cubic root of 1805650149 is about 1217.7118603300.

The spelling of 1805650149 in words is "one billion, eight hundred five million, six hundred fifty thousand, one hundred forty-nine".