1812349149 has 16 divisors (see below), whose sum is σ = 2615983104. Its totient is φ = 1109448000.

The previous prime is 1812349139. The next prime is 1812349157. The reversal of 1812349149 is 9419432181.

It is not a de Polignac number, because 1812349149 - 2⁸ = 1812348893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1812349149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812349139) 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 15 ways as a sum of consecutive naturals, for example, 114202 + ... + 129099.

It is an arithmetic number, because the mean of its divisors is an integer number (163498944).

Almost surely, 2^1812349149 is an apocalyptic number.

It is an amenable number.

1812349149 is a deficient number, since it is larger than the sum of its proper divisors (803633955).

1812349149 is a wasteful number, since it uses less digits than its factorization.

1812349149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243508.

The product of its digits is 62208, while the sum is 42.

The square root of 1812349149 is about 42571.6942228049. The cubic root of 1812349149 is about 1219.2159140347.

The spelling of 1812349149 in words is "one billion, eight hundred twelve million, three hundred forty-nine thousand, one hundred forty-nine".