3856768785 has 24 divisors (see below), whose sum is σ = 6706448424. Its totient is φ = 2050364160.

The previous prime is 3856768763. The next prime is 3856768793. The reversal of 3856768785 is 5878676583.

3856768785 is a `hidden beast` number, since 3 + 8 + 567 + 68 + 7 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 506790144 + 3349978641 = 22512^2 + 57879^2 .

It is not a de Polignac number, because 3856768785 - 2⁹ = 3856768273 is a prime.

It is a super-3 number, since 3×3856768785³ (a number of 30 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 122826 + ... + 150995.

It is an arithmetic number, because the mean of its divisors is an integer number (279435351).

Almost surely, 2^3856768785 is an apocalyptic number.

It is an amenable number.

3856768785 is a deficient number, since it is larger than the sum of its proper divisors (2849679639).

3856768785 is a wasteful number, since it uses less digits than its factorization.

3856768785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274145 (or 274142 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The square root of 3856768785 is about 62102.8887009292. Note that the first 3 decimals coincide. The cubic root of 3856768785 is about 1568.2231761470.

It can be divided in two parts, 3856 and 768785, that added together give a square (772641 = 879²).

The spelling of 3856768785 in words is "three billion, eight hundred fifty-six million, seven hundred sixty-eight thousand, seven hundred eighty-five".