3945610865 has 8 divisors (see below), whose sum is σ = 5411123520. Its totient is φ = 2705561712.

The previous prime is 3945610861. The next prime is 3945610873. The reversal of 3945610865 is 5680165493.

It is a happy number.

3945610865 is digitally balanced in base 3, 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 3945610865 - 2² = 3945610861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3945610861) 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 7 ways as a sum of consecutive naturals, for example, 56365835 + ... + 56365904.

It is an arithmetic number, because the mean of its divisors is an integer number (676390440).

Almost surely, 2^3945610865 is an apocalyptic number.

3945610865 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3945610865 is a deficient number, since it is larger than the sum of its proper divisors (1465512655).

3945610865 is a wasteful number, since it uses less digits than its factorization.

3945610865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112731751.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 3945610865 is about 62814.0976612735. The cubic root of 3945610865 is about 1580.1734127081.

The spelling of 3945610865 in words is "three billion, nine hundred forty-five million, six hundred ten thousand, eight hundred sixty-five".