1805122144369 has 4 divisors (see below), whose sum is σ = 1900128573040. Its totient is φ = 1710115715700.

The previous prime is 1805122144351. The next prime is 1805122144387. The reversal of 1805122144369 is 9634412215081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1805122144351) and next prime (1805122144387).

It is not a de Polignac number, because 1805122144369 - 2¹⁵ = 1805122111601 is a prime.

It is a super-2 number, since 2×1805122144369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1805122144349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47503214307 + ... + 47503214344.

It is an arithmetic number, because the mean of its divisors is an integer number (475032143260).

Almost surely, 2^{1805122144369} is an apocalyptic number.

1805122144369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1805122144369 is a deficient number, since it is larger than the sum of its proper divisors (95006428671).

1805122144369 is an equidigital number, since it uses as much as digits as its factorization.

1805122144369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95006428670.

The product of its (nonzero) digits is 414720, while the sum is 46.

It can be divided in two parts, 1805122 and 144369, that added together give a palindrome (1949491).

The spelling of 1805122144369 in words is "one trillion, eight hundred five billion, one hundred twenty-two million, one hundred forty-four thousand, three hundred sixty-nine".