3865623166812 has 48 divisors (see below), whose sum is σ = 9931728546432. Its totient is φ = 1160453282880.

The previous prime is 3865623166789. The next prime is 3865623166817. The reversal of 3865623166812 is 2186613265683.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865623166817) 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, 136831783 + ... + 136860030.

It is an arithmetic number, because the mean of its divisors is an integer number (206911011384).

Almost surely, 2^{3865623166812} is an apocalyptic number.

It is an amenable number.

3865623166812 is an abundant number, since it is smaller than the sum of its proper divisors (6066105379620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3865623166812 is a wasteful number, since it uses less digits than its factorization.

3865623166812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273691938 (or 273691936 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 57.

The spelling of 3865623166812 in words is "three trillion, eight hundred sixty-five billion, six hundred twenty-three million, one hundred sixty-six thousand, eight hundred twelve".