1810133645 has 18 divisors (see below), whose sum is σ = 2220101898. Its totient is φ = 1416826528.

The previous prime is 1810133627. The next prime is 1810133657. The reversal of 1810133645 is 5463310181.

It can be written as a sum of positive squares in 3 ways, for example, as 495418564 + 1314715081 = 22258^2 + 36259^2 .

It is not a de Polignac number, because 1810133645 - 2²⁶ = 1743024781 is a prime.

It is a super-3 number, since 3×1810133645³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

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 17 ways as a sum of consecutive naturals, for example, 5041976 + ... + 5042334.

Almost surely, 2^1810133645 is an apocalyptic number.

It is an amenable number.

1810133645 is a deficient number, since it is larger than the sum of its proper divisors (409968253).

1810133645 is an frugal number, since it uses more digits than its factorization.

1810133645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1810133645 is about 42545.6654078885. The cubic root of 1810133645 is about 1218.7189017881.

The spelling of 1810133645 in words is "one billion, eight hundred ten million, one hundred thirty-three thousand, six hundred forty-five".