3782681885 has 4 divisors (see below), whose sum is σ = 4539218268. Its totient is φ = 3026145504.

The previous prime is 3782681813. The next prime is 3782681887. The reversal of 3782681885 is 5881862873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5881862873 = 2381 ⋅2470333.

It can be written as a sum of positive squares in 2 ways, for example, as 1560408004 + 2222273881 = 39502^2 + 47141^2 .

It is a cyclic number.

It is not a de Polignac number, because 3782681885 - 2⁸ = 3782681629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3782681885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3782681887) 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 3 ways as a sum of consecutive naturals, for example, 378268184 + ... + 378268193.

It is an arithmetic number, because the mean of its divisors is an integer number (1134804567).

Almost surely, 2^3782681885 is an apocalyptic number.

It is an amenable number.

3782681885 is a deficient number, since it is larger than the sum of its proper divisors (756536383).

3782681885 is an equidigital number, since it uses as much as digits as its factorization.

3782681885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756536382.

The product of its digits is 5160960, while the sum is 56.

The square root of 3782681885 is about 61503.5111599330. The cubic root of 3782681885 is about 1558.1165474853.

The spelling of 3782681885 in words is "three billion, seven hundred eighty-two million, six hundred eighty-one thousand, eight hundred eighty-five".