1807782433444 has 27 divisors (see below), whose sum is σ = 3425760472323. Its totient is φ = 834344988672.

The previous prime is 1807782433433. The next prime is 1807782433477. The reversal of 1807782433444 is 4443342877081.

It is a happy number.

The square root of 1807782433444 is 1344538.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 80450515044 + 1727331918400 = 283638^2 + 1314280^2 .

It is a super-2 number, since 2×1807782433444² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 34932132 + ... + 34983844.

Almost surely, 2^{1807782433444} is an apocalyptic number.

1807782433444 is the 1344538-th square number.

It is an amenable number.

1807782433444 is a deficient number, since it is larger than the sum of its proper divisors (1617978038879).

1807782433444 is an frugal number, since it uses more digits than its factorization.

1807782433444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103456 (or 51728 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 55.

The spelling of 1807782433444 in words is "one trillion, eight hundred seven billion, seven hundred eighty-two million, four hundred thirty-three thousand, four hundred forty-four".