1812007165 has 8 divisors (see below), whose sum is σ = 2195938008. Its totient is φ = 1435252800.

The previous prime is 1812007157. The next prime is 1812007193. The reversal of 1812007165 is 5617002181.

It can be written as a sum of positive squares in 4 ways, for example, as 156900676 + 1655106489 = 12526^2 + 40683^2 .

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

It is not a de Polignac number, because 1812007165 - 2³ = 1812007157 is a prime.

It is a super-2 number, since 2×1812007165² = 6566739932022674450, which contains 22 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1793562 + ... + 1794571.

It is an arithmetic number, because the mean of its divisors is an integer number (274492251).

Almost surely, 2^1812007165 is an apocalyptic number.

It is an amenable number.

1812007165 is a deficient number, since it is larger than the sum of its proper divisors (383930843).

1812007165 is a wasteful number, since it uses less digits than its factorization.

1812007165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588239.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1812007165 is about 42567.6774677689. The cubic root of 1812007165 is about 1219.1392219389.

The spelling of 1812007165 in words is "one billion, eight hundred twelve million, seven thousand, one hundred sixty-five".