3985061816 has 32 divisors (see below), whose sum is σ = 7540352640. Its totient is φ = 1974375648.

The previous prime is 3985061813. The next prime is 3985061833. The reversal of 3985061816 is 6181605893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985061813) 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 7 ways as a sum of consecutive naturals, for example, 448085 + ... + 456891.

It is an arithmetic number, because the mean of its divisors is an integer number (235636020).

Almost surely, 2^3985061816 is an apocalyptic number.

It is an amenable number.

3985061816 is a deficient number, since it is larger than the sum of its proper divisors (3555290824).

3985061816 is a wasteful number, since it uses less digits than its factorization.

3985061816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323 (or 9319 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 3985061816 is about 63127.3460237321. The cubic root of 3985061816 is about 1585.4225128556.

The spelling of 3985061816 in words is "three billion, nine hundred eighty-five million, sixty-one thousand, eight hundred sixteen".