3818815965 has 24 divisors (see below), whose sum is σ = 6623842680. Its totient is φ = 2035298304.

The previous prime is 3818815937. The next prime is 3818815967. The reversal of 3818815965 is 5695188183.

3818815965 is a `hidden beast` number, since 38 + 18 + 8 + 1 + 596 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 431226756 + 3387589209 = 20766^2 + 58203^2 .

It is not a de Polignac number, because 3818815965 - 2⁵ = 3818815933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818815967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38509 + ... + 95501.

It is an arithmetic number, because the mean of its divisors is an integer number (275993445).

Almost surely, 2^3818815965 is an apocalyptic number.

It is an amenable number.

3818815965 is a deficient number, since it is larger than the sum of its proper divisors (2805026715).

3818815965 is a wasteful number, since it uses less digits than its factorization.

3818815965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58493 (or 58490 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The square root of 3818815965 is about 61796.5692008869. The cubic root of 3818815965 is about 1563.0621374913.

The spelling of 3818815965 in words is "three billion, eight hundred eighteen million, eight hundred fifteen thousand, nine hundred sixty-five".