3813746380785 has 64 divisors (see below), whose sum is σ = 7396678840320. Its totient is φ = 1849008600000.

The previous prime is 3813746380777. The next prime is 3813746380819. The reversal of 3813746380785 is 5870836473183.

3813746380785 is a `hidden beast` number, since 3 + 8 + 13 + 7 + 463 + 80 + 7 + 85 = 666.

It is not a de Polignac number, because 3813746380785 - 2³ = 3813746380777 is a prime.

It is a super-2 number, since 2×3813746380785² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47852920 + ... + 47932550.

It is an arithmetic number, because the mean of its divisors is an integer number (115573106880).

Almost surely, 2^{3813746380785} is an apocalyptic number.

It is an amenable number.

3813746380785 is a deficient number, since it is larger than the sum of its proper divisors (3582932459535).

3813746380785 is a wasteful number, since it uses less digits than its factorization.

3813746380785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111907 (or 111901 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 63.

The spelling of 3813746380785 in words is "three trillion, eight hundred thirteen billion, seven hundred forty-six million, three hundred eighty thousand, seven hundred eighty-five".