64555165 has 4 divisors (see below), whose sum is σ = 77466204. Its totient is φ = 51644128.

The previous prime is 64555163. The next prime is 64555187. The reversal of 64555165 is 56155546.

64555165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56155546 = 2 ⋅28077773.

It can be written as a sum of positive squares in 2 ways, for example, as 34316164 + 30239001 = 5858^2 + 5499^2 .

It is a cyclic number.

It is not a de Polignac number, because 64555165 - 2¹ = 64555163 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 (64555163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6455512 + ... + 6455521.

It is an arithmetic number, because the mean of its divisors is an integer number (19366551).

Almost surely, 2^64555165 is an apocalyptic number.

It is an amenable number.

64555165 is a deficient number, since it is larger than the sum of its proper divisors (12911039).

64555165 is a wasteful number, since it uses less digits than its factorization.

64555165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12911038.

The product of its digits is 90000, while the sum is 37.

The square root of 64555165 is about 8034.6228909638. The cubic root of 64555165 is about 401.1532655012.

The spelling of 64555165 in words is "sixty-four million, five hundred fifty-five thousand, one hundred sixty-five".