1808112624221 has 8 divisors (see below), whose sum is σ = 1843551165144. Its totient is φ = 1772861094720.

The previous prime is 1808112624181. The next prime is 1808112624247. The reversal of 1808112624221 is 1224262118081.

It can be written as a sum of positive squares in 4 ways, for example, as 526720320025 + 1281392304196 = 725755^2 + 1131986^2 .

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 1808112624221 - 2²⁶ = 1808045515357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808112624281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46733330 + ... + 46772003.

It is an arithmetic number, because the mean of its divisors is an integer number (230443895643).

Almost surely, 2^{1808112624221} is an apocalyptic number.

It is an amenable number.

1808112624221 is a deficient number, since it is larger than the sum of its proper divisors (35438540923).

1808112624221 is an equidigital number, since it uses as much as digits as its factorization.

1808112624221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93505711.

The product of its (nonzero) digits is 24576, while the sum is 38.

The spelling of 1808112624221 in words is "one trillion, eight hundred eight billion, one hundred twelve million, six hundred twenty-four thousand, two hundred twenty-one".