3865659845 has 16 divisors (see below), whose sum is σ = 4701957120. Its totient is φ = 3050533824.

The previous prime is 3865659817. The next prime is 3865659859. The reversal of 3865659845 is 5489565683.

3865659845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3865659845 - 2²⁰ = 3864611269 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274076 + ... + 287834.

It is an arithmetic number, because the mean of its divisors is an integer number (293872320).

Almost surely, 2^3865659845 is an apocalyptic number.

It is an amenable number.

3865659845 is a deficient number, since it is larger than the sum of its proper divisors (836297275).

3865659845 is a wasteful number, since it uses less digits than its factorization.

3865659845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14524.

The product of its digits is 31104000, while the sum is 59.

The square root of 3865659845 is about 62174.4307975554. The cubic root of 3865659845 is about 1569.4273331651.

The spelling of 3865659845 in words is "three billion, eight hundred sixty-five million, six hundred fifty-nine thousand, eight hundred forty-five".