3821681664 has 66 divisors (see below), whose sum is σ = 11035049480. Its totient is φ = 1273890816.

The previous prime is 3821681663. The next prime is 3821681671. The reversal of 3821681664 is 4661861283.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821681663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198124 + ... + 216555.

Almost surely, 2^3821681664 is an apocalyptic number.

It is an amenable number.

3821681664 is an abundant number, since it is smaller than the sum of its proper divisors (7213367816).

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

3821681664 is a wasteful number, since it uses less digits than its factorization.

3821681664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414705 (or 414684 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 3821681664 is about 61819.7514068117. The cubic root of 3821681664 is about 1563.4530217929.

The spelling of 3821681664 in words is "three billion, eight hundred twenty-one million, six hundred eighty-one thousand, six hundred sixty-four".