3881967721768 has 32 divisors (see below), whose sum is σ = 7316754363360. Its totient is φ = 1930842204480.

The previous prime is 3881967721741. The next prime is 3881967721873. The reversal of 3881967721768 is 8671277691883.

It is a super-2 number, since 2×3881967721768² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3881967721768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2905371 + ... + 4025557.

It is an arithmetic number, because the mean of its divisors is an integer number (228648573855).

Almost surely, 2^{3881967721768} is an apocalyptic number.

It is an amenable number.

3881967721768 is a deficient number, since it is larger than the sum of its proper divisors (3434786641592).

3881967721768 is a wasteful number, since it uses less digits than its factorization.

3881967721768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122457 (or 1122453 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 73.

The spelling of 3881967721768 in words is "three trillion, eight hundred eighty-one billion, nine hundred sixty-seven million, seven hundred twenty-one thousand, seven hundred sixty-eight".