3945646911 has 16 divisors (see below), whose sum is σ = 5351230080. Its totient is φ = 2585623200.

The previous prime is 3945646897. The next prime is 3945646919. The reversal of 3945646911 is 1196465493.

It is a happy number.

3945646911 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 3945646911 - 2¹⁸ = 3945384767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945646919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4725 + ... + 88958.

It is an arithmetic number, because the mean of its divisors is an integer number (334451880).

Almost surely, 2^3945646911 is an apocalyptic number.

3945646911 is a deficient number, since it is larger than the sum of its proper divisors (1405583169).

3945646911 is a wasteful number, since it uses less digits than its factorization.

3945646911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93926.

The product of its digits is 699840, while the sum is 48.

The square root of 3945646911 is about 62814.3845866534. The cubic root of 3945646911 is about 1580.1782247013.

The spelling of 3945646911 in words is "three billion, nine hundred forty-five million, six hundred forty-six thousand, nine hundred eleven".