1812659045 has 8 divisors (see below), whose sum is σ = 2233980024. Its totient is φ = 1410934464.

The previous prime is 1812659041. The next prime is 1812659111. The reversal of 1812659045 is 5409562181.

It can be written as a sum of positive squares in 4 ways, for example, as 180579844 + 1632079201 = 13438^2 + 40399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1812659045 - 2² = 1812659041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1812658993 and 1812659011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812659041) 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 7 ways as a sum of consecutive naturals, for example, 4898894 + ... + 4899263.

It is an arithmetic number, because the mean of its divisors is an integer number (279247503).

Almost surely, 2^1812659045 is an apocalyptic number.

It is an amenable number.

1812659045 is a deficient number, since it is larger than the sum of its proper divisors (421320979).

1812659045 is an equidigital number, since it uses as much as digits as its factorization.

1812659045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9798199.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1812659045 is about 42575.3337626377. Note that the first 3 decimals coincide. The cubic root of 1812659045 is about 1219.2854018597.

The spelling of 1812659045 in words is "one billion, eight hundred twelve million, six hundred fifty-nine thousand, forty-five".