3945616851 has 16 divisors (see below), whose sum is σ = 5780976768. Its totient is φ = 2373825600.

The previous prime is 3945616793. The next prime is 3945616877. The reversal of 3945616851 is 1586165493.

It is not a de Polignac number, because 3945616851 - 2²² = 3941422547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3945616851.

It is not an unprimeable number, because it can be changed into a prime (3945616651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431845 + ... + 440886.

It is an arithmetic number, because the mean of its divisors is an integer number (361311048).

Almost surely, 2^3945616851 is an apocalyptic number.

3945616851 is a deficient number, since it is larger than the sum of its proper divisors (1835359917).

3945616851 is a wasteful number, since it uses less digits than its factorization.

3945616851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872882.

The product of its digits is 777600, while the sum is 48.

The square root of 3945616851 is about 62814.1453097947. The cubic root of 3945616851 is about 1580.1742118166.

The spelling of 3945616851 in words is "three billion, nine hundred forty-five million, six hundred sixteen thousand, eight hundred fifty-one".