3979718865 has 128 divisors (see below), whose sum is σ = 7710336000. Its totient is φ = 1941553152.

The previous prime is 3979718861. The next prime is 3979718867. The reversal of 3979718865 is 5688179793.

3979718865 is a `hidden beast` number, since 397 + 9 + 7 + 188 + 65 = 666.

3979718865 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3979718865 - 2² = 3979718861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3979718861) 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 127 ways as a sum of consecutive naturals, for example, 17378571 + ... + 17378799.

It is an arithmetic number, because the mean of its divisors is an integer number (60237000).

Almost surely, 2^3979718865 is an apocalyptic number.

It is an amenable number.

3979718865 is a deficient number, since it is larger than the sum of its proper divisors (3730617135).

3979718865 is a wasteful number, since it uses less digits than its factorization.

3979718865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 3979718865 is about 63085.0129983342. The cubic root of 3979718865 is about 1584.7136469494.

The spelling of 3979718865 in words is "three billion, nine hundred seventy-nine million, seven hundred eighteen thousand, eight hundred sixty-five".