65115885 has 16 divisors (see below), whose sum is σ = 104296896. Its totient is φ = 34691328.

The previous prime is 65115863. The next prime is 65115887. The reversal of 65115885 is 58851156.

It is not a de Polignac number, because 65115885 - 2¹¹ = 65113837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65115887) 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, 17782 + ... + 21128.

It is an arithmetic number, because the mean of its divisors is an integer number (6518556).

Almost surely, 2^65115885 is an apocalyptic number.

It is an amenable number.

65115885 is a deficient number, since it is larger than the sum of its proper divisors (39181011).

65115885 is a wasteful number, since it uses less digits than its factorization.

65115885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652.

The product of its digits is 48000, while the sum is 39.

The square root of 65115885 is about 8069.4414304833. The cubic root of 65115885 is about 402.3113785141.

The spelling of 65115885 in words is "sixty-five million, one hundred fifteen thousand, eight hundred eighty-five".