64839165 has 16 divisors (see below), whose sum is σ = 104814528. Its totient is φ = 34223616.

The previous prime is 64839149. The next prime is 64839167. The reversal of 64839165 is 56193846.

It is not a de Polignac number, because 64839165 - 2⁴ = 64839149 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 (64839167) 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, 20827 + ... + 23736.

It is an arithmetic number, because the mean of its divisors is an integer number (6550908).

Almost surely, 2^64839165 is an apocalyptic number.

It is an amenable number.

64839165 is a deficient number, since it is larger than the sum of its proper divisors (39975363).

64839165 is a wasteful number, since it uses less digits than its factorization.

64839165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44668.

The product of its digits is 155520, while the sum is 42.

The square root of 64839165 is about 8052.2770071577. The cubic root of 64839165 is about 401.7406745590.

The spelling of 64839165 in words is "sixty-four million, eight hundred thirty-nine thousand, one hundred sixty-five".