3985966855 has 16 divisors (see below), whose sum is σ = 5181954624. Its totient is φ = 2925849600.

The previous prime is 3985966841. The next prime is 3985966903. The reversal of 3985966855 is 5586695893.

It is a happy number.

3985966855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3985966855 - 2¹³ = 3985958663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172746 + ... + 194455.

It is an arithmetic number, because the mean of its divisors is an integer number (323872164).

Almost surely, 2^3985966855 is an apocalyptic number.

3985966855 is a deficient number, since it is larger than the sum of its proper divisors (1195987769).

3985966855 is a wasteful number, since it uses less digits than its factorization.

3985966855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367386.

The product of its digits is 69984000, while the sum is 64.

The square root of 3985966855 is about 63134.5139761129. The cubic root of 3985966855 is about 1585.5425244273.

The spelling of 3985966855 in words is "three billion, nine hundred eighty-five million, nine hundred sixty-six thousand, eight hundred fifty-five".