1812912444871 has 16 divisors (see below), whose sum is σ = 1988125147008. Its totient is φ = 1639436551200.

The previous prime is 1812912444829. The next prime is 1812912444877. The reversal of 1812912444871 is 1784442192181.

It is a cyclic number.

It is not a de Polignac number, because 1812912444871 - 2²⁵ = 1812878890439 is a prime.

It is a super-2 number, since 2×1812912444871² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812912444877) 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 15 ways as a sum of consecutive naturals, for example, 12241456 + ... + 12388666.

It is an arithmetic number, because the mean of its divisors is an integer number (124257821688).

Almost surely, 2^{1812912444871} is an apocalyptic number.

1812912444871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1812912444871 is a deficient number, since it is larger than the sum of its proper divisors (175212702137).

1812912444871 is a wasteful number, since it uses less digits than its factorization.

1812912444871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153102.

The product of its digits is 1032192, while the sum is 52.

The spelling of 1812912444871 in words is "one trillion, eight hundred twelve billion, nine hundred twelve million, four hundred forty-four thousand, eight hundred seventy-one".