3943680081 has 8 divisors (see below), whose sum is σ = 5736261984. Its totient is φ = 2390109120.

The previous prime is 3943680049. The next prime is 3943680131. The reversal of 3943680081 is 1800863493.

It is a happy number.

3943680081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3943680081 - 2⁵ = 3943680049 is a prime.

It is a super-2 number, since 2×3943680081² = 31105225162552333122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3943680781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59752696 + ... + 59752761.

It is an arithmetic number, because the mean of its divisors is an integer number (717032748).

Almost surely, 2^3943680081 is an apocalyptic number.

It is an amenable number.

3943680081 is a deficient number, since it is larger than the sum of its proper divisors (1792581903).

3943680081 is a wasteful number, since it uses less digits than its factorization.

3943680081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119505471.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 3943680081 is about 62798.7267466467. The cubic root of 3943680081 is about 1579.9156181235.

The spelling of 3943680081 in words is "three billion, nine hundred forty-three million, six hundred eighty thousand, eighty-one".