3865315109 has 16 divisors (see below), whose sum is σ = 4186411776. Its totient is φ = 3554880000.

The previous prime is 3865315099. The next prime is 3865315127. The reversal of 3865315109 is 9015135683.

It is a cyclic number.

It is not a de Polignac number, because 3865315109 - 2¹⁶ = 3865249573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865315309) 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, 548609 + ... + 555609.

It is an arithmetic number, because the mean of its divisors is an integer number (261650736).

Almost surely, 2^3865315109 is an apocalyptic number.

It is an amenable number.

3865315109 is a deficient number, since it is larger than the sum of its proper divisors (321096667).

3865315109 is a wasteful number, since it uses less digits than its factorization.

3865315109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7756.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 3865315109 is about 62171.6584063832. The cubic root of 3865315109 is about 1569.3806784148.

The spelling of 3865315109 in words is "three billion, eight hundred sixty-five million, three hundred fifteen thousand, one hundred nine".