3851661216 has 192 divisors, whose sum is σ = 11630545920. Its totient is φ = 1107025920.

The previous prime is 3851661211. The next prime is 3851661217. The reversal of 3851661216 is 6121661583.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3851661211) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1120236 + ... + 1123668.

It is an arithmetic number, because the mean of its divisors is an integer number (60575760).

Almost surely, 2^3851661216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3851661216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5815272960).

3851661216 is an abundant number, since it is smaller than the sum of its proper divisors (7778884704).

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

3851661216 is a wasteful number, since it uses less digits than its factorization.

3851661216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3519 (or 3511 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 3851661216 is about 62061.7532462627. The cubic root of 3851661216 is about 1567.5305975524.

The spelling of 3851661216 in words is "three billion, eight hundred fifty-one million, six hundred sixty-one thousand, two hundred sixteen".