3806831581345 has 16 divisors (see below), whose sum is σ = 4926864554640. Its totient is φ = 2807046238464.

The previous prime is 3806831581327. The next prime is 3806831581349. The reversal of 3806831581345 is 5431851386083.

3806831581345 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 251208456849 + 3555623124496 = 501207^2 + 1885636^2 .

It is not a de Polignac number, because 3806831581345 - 2¹⁵ = 3806831548577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3806831581349) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 43210530 + ... + 43298539.

It is an arithmetic number, because the mean of its divisors is an integer number (307929034665).

Almost surely, 2^{3806831581345} is an apocalyptic number.

It is an amenable number.

3806831581345 is a deficient number, since it is larger than the sum of its proper divisors (1120032973295).

3806831581345 is a wasteful number, since it uses less digits than its factorization.

3806831581345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86509764.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 3806831581345 in words is "three trillion, eight hundred six billion, eight hundred thirty-one million, five hundred eighty-one thousand, three hundred forty-five".